31013130220 has 24 divisors (see below), whose sum is σ = 65156321664. Its totient is φ = 12399776256.

The previous prime is 31013130217. The next prime is 31013130223. The reversal of 31013130220 is 2203131013.

It is an interprime number because it is at equal distance from previous prime (31013130217) and next prime (31013130223).

It is a junction number, because it is equal to n+sod(n) for n = 31013130194 and 31013130203.

It is not an unprimeable number, because it can be changed into a prime (31013130223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295644 + ... + 386563.

It is an arithmetic number, because the mean of its divisors is an integer number (2714846736).

Almost surely, 2^31013130220 is an apocalyptic number.

It is an amenable number.

31013130220 is an abundant number, since it is smaller than the sum of its proper divisors (34143191444).

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

31013130220 is a wasteful number, since it uses less digits than its factorization.

31013130220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684489 (or 684487 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31013130220 its reverse (2203131013), we get a palindrome (33216261233).

The spelling of 31013130220 in words is "thirty-one billion, thirteen million, one hundred thirty thousand, two hundred twenty".