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231038874 = 232111768639
BaseRepresentation
bin11011100010101…
…01111110011010
3121002201222202100
431301111332122
5433121220444
634531544230
75503540503
oct1561257632
9532658670
10231038874
11109462a20
126545b076
1338b340c1
1422981baa
151543ae69
hexdc55f9a

231038874 has 48 divisors (see below), whose sum is σ = 578223360. Its totient is φ = 65892480.

The previous prime is 231038861. The next prime is 231038947. The reversal of 231038874 is 478830132.

It is a super-2 number, since 2×2310388742 = 106757922598375752, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30954 + ... + 37685.

It is an arithmetic number, because the mean of its divisors is an integer number (12046320).

Almost surely, 2231038874 is an apocalyptic number.

231038874 is an abundant number, since it is smaller than the sum of its proper divisors (347184486).

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

231038874 is a wasteful number, since it uses less digits than its factorization.

231038874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68675 (or 68672 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 231038874 is about 15199.9629604812. The cubic root of 231038874 is about 613.6136609094.

The spelling of 231038874 in words is "two hundred thirty-one million, thirty-eight thousand, eight hundred seventy-four".

Divisors: 1 2 3 6 9 11 17 18 22 33 34 51 66 99 102 153 187 198 306 374 561 1122 1683 3366 68639 137278 205917 411834 617751 755029 1166863 1235502 1510058 2265087 2333726 3500589 4530174 6795261 7001178 10501767 12835493 13590522 21003534 25670986 38506479 77012958 115519437 231038874