31949231918212 has 18 divisors (see below), whose sum is σ = 65039507833902. Its totient is φ = 13692527964864.

The previous prime is 31949231918203. The next prime is 31949231918341. The reversal of 31949231918212 is 21281913294913.

It can be written as a sum of positive squares in only one way, i.e., 30667051630656 + 1282180287556 = 5537784^2 + 1132334^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81503142453 + ... + 81503142844.

Almost surely, 2^{31949231918212} is an apocalyptic number.

It is an amenable number.

31949231918212 is an abundant number, since it is smaller than the sum of its proper divisors (33090275915690).

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

31949231918212 is a wasteful number, since it uses less digits than its factorization.

31949231918212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163006285315 (or 163006285306 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 55.

The spelling of 31949231918212 in words is "thirty-one trillion, nine hundred forty-nine billion, two hundred thirty-one million, nine hundred eighteen thousand, two hundred twelve".