231500031522642 has 48 divisors (see below), whose sum is σ = 523459523852928. Its totient is φ = 73801993605120.

The previous prime is 231500031522521. The next prime is 231500031522653. The reversal of 231500031522642 is 246225130005132.

231500031522642 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 0 + 0 + 0 + 3 + 1 + 5 + 2 + 2 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 231500031522597 and 231500031522606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33220198 + ... + 39580065.

It is an arithmetic number, because the mean of its divisors is an integer number (10905406746936).

Almost surely, 2^{231500031522642} is an apocalyptic number.

231500031522642 is an abundant number, since it is smaller than the sum of its proper divisors (291959492330286).

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

231500031522642 is a wasteful number, since it uses less digits than its factorization.

231500031522642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72807975 (or 72807972 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 231500031522642 its reverse (246225130005132), we get a palindrome (477725161527774).

The spelling of 231500031522642 in words is "two hundred thirty-one trillion, five hundred billion, thirty-one million, five hundred twenty-two thousand, six hundred forty-two".