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243138452 = 221091274391
BaseRepresentation
bin11100111110111…
…11111110010100
3121221111201020212
432133133332110
5444220412302
640043144552
76011433314
oct1637377624
9557451225
10243138452
11115277577
1269515158
133b4ac50b
1424411444
151652b052
hexe7dff94

243138452 has 24 divisors (see below), whose sum is σ = 432875520. Its totient is φ = 119478240.

The previous prime is 243138443. The next prime is 243138463. The reversal of 243138452 is 254831342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53177 + ... + 57567.

It is an arithmetic number, because the mean of its divisors is an integer number (18036480).

Almost surely, 2243138452 is an apocalyptic number.

It is an amenable number.

243138452 is a deficient number, since it is larger than the sum of its proper divisors (189737068).

243138452 is a wasteful number, since it uses less digits than its factorization.

243138452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631 (or 4629 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 243138452 is about 15592.8974857144. The cubic root of 243138452 is about 624.1436395441.

Adding to 243138452 its reverse (254831342), we get a palindrome (497969794).

The spelling of 243138452 in words is "two hundred forty-three million, one hundred thirty-eight thousand, four hundred fifty-two".

Divisors: 1 2 4 109 127 218 254 436 508 4391 8782 13843 17564 27686 55372 478619 557657 957238 1115314 1914476 2230628 60784613 121569226 243138452