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256035045 = 35721731661
BaseRepresentation
bin11110100001011…
…00100011100101
3122211202221001110
433100230203211
51011021110140
641223415233
76226155600
oct1720544345
9584687043
10256035045
11121585a12
12718b4519
1341076636
142600b337
1517727380
hexf42c8e5

256035045 has 96 divisors (see below), whose sum is σ = 521634816. Its totient is φ = 106444800.

The previous prime is 256035041. The next prime is 256035067. The reversal of 256035045 is 540530652.

256035045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256035045 - 22 = 256035041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256035041) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 387015 + ... + 387675.

It is an arithmetic number, because the mean of its divisors is an integer number (5433696).

Almost surely, 2256035045 is an apocalyptic number.

It is an amenable number.

256035045 is an abundant number, since it is smaller than the sum of its proper divisors (265599771).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256035045 is a wasteful number, since it uses less digits than its factorization.

256035045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 256035045 is about 16001.0951187723. The cubic root of 256035045 is about 634.9893936683.

Adding to 256035045 its reverse (540530652), we get a palindrome (796565697).

The spelling of 256035045 in words is "two hundred fifty-six million, thirty-five thousand, forty-five".

Divisors: 1 3 5 7 15 17 21 31 35 49 51 85 93 105 119 147 155 217 245 255 357 465 527 595 651 661 735 833 1085 1519 1581 1785 1983 2499 2635 3255 3305 3689 4165 4557 4627 7595 7905 9915 11067 11237 12495 13881 18445 20491 22785 23135 25823 32389 33711 55335 56185 61473 69405 77469 78659 97167 102455 129115 143437 161945 168555 235977 307365 348347 387345 393295 430311 485835 550613 717185 1004059 1045041 1179885 1651839 1741735 2151555 2438429 2753065 3012177 5020295 5225205 7315287 8259195 12192145 15060885 17069003 36576435 51207009 85345015 256035045