31130000321 has 12 divisors (see below), whose sum is σ = 36215359488. Its totient is φ = 26680713192.

The previous prime is 31130000309. The next prime is 31130000411. The reversal of 31130000321 is 12300003113.

It is a de Polignac number, because none of the positive numbers 2^k-31130000321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31130000296 and 31130000305.

It is not an unprimeable number, because it can be changed into a prime (31130000221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1038080 + ... + 1067646.

It is an arithmetic number, because the mean of its divisors is an integer number (3017946624).

Almost surely, 2^31130000321 is an apocalyptic number.

It is an amenable number.

31130000321 is a deficient number, since it is larger than the sum of its proper divisors (5085359167).

31130000321 is a wasteful number, since it uses less digits than its factorization.

31130000321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51068 (or 51061 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31130000321 its reverse (12300003113), we get a palindrome (43430003434).

The spelling of 31130000321 in words is "thirty-one billion, one hundred thirty million, three hundred twenty-one", and thus it is an aban number.