231872643 has 12 divisors (see below), whose sum is σ = 335515128. Its totient is φ = 154310400.

The previous prime is 231872629. The next prime is 231872647. The reversal of 231872643 is 346278132.

It is a happy number.

231872643 is a `hidden beast` number, since 2 + 3 + 1 + 8 + 7 + 2 + 643 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-231872643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231872598 and 231872607.

It is not an unprimeable number, because it can be changed into a prime (231872647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17133 + ... + 27518.

It is an arithmetic number, because the mean of its divisors is an integer number (27959594).

Almost surely, 2^231872643 is an apocalyptic number.

231872643 is a deficient number, since it is larger than the sum of its proper divisors (103642485).

231872643 is a wasteful number, since it uses less digits than its factorization.

231872643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45234 (or 45231 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 231872643 is about 15227.3649394766. The cubic root of 231872643 is about 614.3509074722.

The spelling of 231872643 in words is "two hundred thirty-one million, eight hundred seventy-two thousand, six hundred forty-three".