31047304432 has 20 divisors (see below), whose sum is σ = 61779941416. Its totient is φ = 15104093760.

The previous prime is 31047304427. The next prime is 31047304433. The reversal of 31047304432 is 23440374013.

It is a happy number.

It is a super-2 number, since 2×31047304432² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31047304394 and 31047304403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31047304433) 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, 26221794 + ... + 26222977.

Almost surely, 2^31047304432 is an apocalyptic number.

It is an amenable number.

31047304432 is a deficient number, since it is larger than the sum of its proper divisors (30732636984).

31047304432 is a wasteful number, since it uses less digits than its factorization.

31047304432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52444816 (or 52444810 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 31.

Adding to 31047304432 its reverse (23440374013), we get a palindrome (54487678445).

The spelling of 31047304432 in words is "thirty-one billion, forty-seven million, three hundred four thousand, four hundred thirty-two".