31000212330 has 32 divisors (see below), whose sum is σ = 74523124224. Its totient is φ = 8253099456.

The previous prime is 31000212323. The next prime is 31000212359. The reversal of 31000212330 is 3321200013.

It is a super-2 number, since 2×31000212330² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 832977 + ... + 869396.

It is an arithmetic number, because the mean of its divisors is an integer number (2328847632).

Almost surely, 2^31000212330 is an apocalyptic number.

31000212330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31000212330 is an abundant number, since it is smaller than the sum of its proper divisors (43522911894).

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

31000212330 is a wasteful number, since it uses less digits than its factorization.

31000212330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702990.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31000212330 its reverse (3321200013), we get a palindrome (34321412343).

The spelling of 31000212330 in words is "thirty-one billion, two hundred twelve thousand, three hundred thirty".