31256115212 has 48 divisors (see below), whose sum is σ = 63360245760. Its totient is φ = 13214066112.

The previous prime is 31256115131. The next prime is 31256115217. The reversal of 31256115212 is 21251165213.

It is not an unprimeable number, because it can be changed into a prime (31256115217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2730533 + ... + 2741955.

It is an arithmetic number, because the mean of its divisors is an integer number (1320005120).

Almost surely, 2^31256115212 is an apocalyptic number.

It is an amenable number.

31256115212 is an abundant number, since it is smaller than the sum of its proper divisors (32104130548).

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

31256115212 is a wasteful number, since it uses less digits than its factorization.

31256115212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12750 (or 12748 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The spelling of 31256115212 in words is "thirty-one billion, two hundred fifty-six million, one hundred fifteen thousand, two hundred twelve".