231551431105004 has 24 divisors (see below), whose sum is σ = 406067723430768. Its totient is φ = 115532326540800.

The previous prime is 231551431104913. The next prime is 231551431105009. The reversal of 231551431105004 is 400501134155132.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (231551431105009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26841689 + ... + 34403184.

It is an arithmetic number, because the mean of its divisors is an integer number (16919488476282).

Almost surely, 2^{231551431105004} is an apocalyptic number.

It is an amenable number.

231551431105004 is a deficient number, since it is larger than the sum of its proper divisors (174516292325764).

231551431105004 is a wasteful number, since it uses less digits than its factorization.

231551431105004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61246865 (or 61246863 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 231551431105004 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, one hundred five thousand, four".