31540325432 has 64 divisors (see below), whose sum is σ = 77611219200. Its totient is φ = 11641674240.

The previous prime is 31540325429. The next prime is 31540325447. The reversal of 31540325432 is 23452304513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1335713 + ... + 1359120.

It is an arithmetic number, because the mean of its divisors is an integer number (1212675300).

Almost surely, 2^31540325432 is an apocalyptic number.

It is an amenable number.

31540325432 is an abundant number, since it is smaller than the sum of its proper divisors (46070893768).

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

31540325432 is a wasteful number, since it uses less digits than its factorization.

31540325432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694876 (or 2694872 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 31540325432 its reverse (23452304513), we get a palindrome (54992629945).

The spelling of 31540325432 in words is "thirty-one billion, five hundred forty million, three hundred twenty-five thousand, four hundred thirty-two".