31504305432 has 16 divisors (see below), whose sum is σ = 78760763640. Its totient is φ = 10501435136.

The previous prime is 31504305431. The next prime is 31504305433. The reversal of 31504305432 is 23450340513.

It is an interprime number because it is at equal distance from previous prime (31504305431) and next prime (31504305433).

It is a self number, because there is not a number n which added to its sum of digits gives 31504305432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31504305431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656339673 + ... + 656339720.

Almost surely, 2^31504305432 is an apocalyptic number.

It is an amenable number.

31504305432 is an abundant number, since it is smaller than the sum of its proper divisors (47256458208).

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

31504305432 is a wasteful number, since it uses less digits than its factorization.

31504305432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312679402 (or 1312679398 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 31504305432 its reverse (23450340513), we get a palindrome (54954645945).

The spelling of 31504305432 in words is "thirty-one billion, five hundred four million, three hundred five thousand, four hundred thirty-two".