31353139212 has 24 divisors (see below), whose sum is σ = 73479610176. Its totient is φ = 10405005648.

The previous prime is 31353139189. The next prime is 31353139303. The reversal of 31353139212 is 21293135313.

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, 5752258 + ... + 5757705.

It is an arithmetic number, because the mean of its divisors is an integer number (3061650424).

Almost surely, 2^31353139212 is an apocalyptic number.

It is an amenable number.

31353139212 is an abundant number, since it is smaller than the sum of its proper divisors (42126470964).

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

31353139212 is a wasteful number, since it uses less digits than its factorization.

31353139212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11510197 (or 11510195 counting only the distinct ones).

The product of its digits is 14580, while the sum is 33.

The spelling of 31353139212 in words is "thirty-one billion, three hundred fifty-three million, one hundred thirty-nine thousand, two hundred twelve".