31561000250612 has 36 divisors (see below), whose sum is σ = 66619064262240. Its totient is φ = 12814240699152.

The previous prime is 31561000250599. The next prime is 31561000250617. The reversal of 31561000250612 is 21605200016513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31561000250617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1561179062 + ... + 1561199277.

It is an arithmetic number, because the mean of its divisors is an integer number (1850529562840).

Almost surely, 2^{31561000250612} is an apocalyptic number.

It is an amenable number.

31561000250612 is an abundant number, since it is smaller than the sum of its proper divisors (35058064011628).

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

31561000250612 is a wasteful number, since it uses less digits than its factorization.

31561000250612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122378388 (or 3122378367 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 31561000250612 in words is "thirty-one trillion, five hundred sixty-one billion, two hundred fifty thousand, six hundred twelve".