31000032304 has 40 divisors (see below), whose sum is σ = 63607714560. Its totient is φ = 14585484288.

The previous prime is 31000032281. The next prime is 31000032319. The reversal of 31000032304 is 40323000013.

It is a super-2 number, since 2×31000032304² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2477937 + ... + 2490415.

It is an arithmetic number, because the mean of its divisors is an integer number (1590192864).

Almost surely, 2^31000032304 is an apocalyptic number.

31000032304 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31000032304 is an abundant number, since it is smaller than the sum of its proper divisors (32607682256).

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

31000032304 is a wasteful number, since it uses less digits than its factorization.

31000032304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21637 (or 21631 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 31000032304 its reverse (40323000013), we get a palindrome (71323032317).

The spelling of 31000032304 in words is "thirty-one billion, thirty-two thousand, three hundred four".