31212230210 has 24 divisors (see below), whose sum is σ = 65354589180. Its totient is φ = 10701335904.

The previous prime is 31212230207. The next prime is 31212230263. The reversal of 31212230210 is 1203221213.

It can be written as a sum of positive squares in 2 ways, for example, as 29347458721 + 1864771489 = 171311^2 + 43183^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31848725 + ... + 31849704.

Almost surely, 2^31212230210 is an apocalyptic number.

31212230210 is an abundant number, since it is smaller than the sum of its proper divisors (34142358970).

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

31212230210 is a wasteful number, since it uses less digits than its factorization.

31212230210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63698450 (or 63698443 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31212230210 its reverse (1203221213), we get a palindrome (32415451423).

The spelling of 31212230210 in words is "thirty-one billion, two hundred twelve million, two hundred thirty thousand, two hundred ten".