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80231445 = 3357591439
BaseRepresentation
bin1001100100000…
…11110000010101
312120222011212000
410302003300111
5131014401240
611543345513
71662645630
oct462036025
9176864760
1080231445
114131a088
1222a52299
1313811838
14a926c17
15709c430
hex4c83c15

80231445 has 64 divisors (see below), whose sum is σ = 165888000. Its totient is φ = 36030528.

The previous prime is 80231423. The next prime is 80231461. The reversal of 80231445 is 54413208.

It is not a de Polignac number, because 80231445 - 25 = 80231413 is a prime.

It is a super-3 number, since 3×802314453 (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55036 + ... + 56474.

It is an arithmetic number, because the mean of its divisors is an integer number (2592000).

Almost surely, 280231445 is an apocalyptic number.

It is an amenable number.

80231445 is an abundant number, since it is smaller than the sum of its proper divisors (85656555).

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

80231445 is a wasteful number, since it uses less digits than its factorization.

80231445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 80231445 is about 8957.2007346045. The cubic root of 80231445 is about 431.3020655474.

The spelling of 80231445 in words is "eighty million, two hundred thirty-one thousand, four hundred forty-five".

Divisors: 1 3 5 7 9 15 21 27 35 45 59 63 105 135 177 189 295 315 413 531 885 945 1239 1439 1593 2065 2655 3717 4317 6195 7195 7965 10073 11151 12951 18585 21585 30219 38853 50365 55755 64755 84901 90657 151095 194265 254703 271971 424505 453285 594307 764109 1273515 1359855 1782921 2292327 2971535 3820545 5348763 8914605 11461635 16046289 26743815 80231445