31312364208 has 160 divisors (see below), whose sum is σ = 83711546880. Its totient is φ = 10081843200.

The previous prime is 31312364203. The next prime is 31312364219. The reversal of 31312364208 is 80246321313.

It is a Cunningham number, because it is equal to 176953²-1.

It is not an unprimeable number, because it can be changed into a prime (31312364203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36451683 + ... + 36452541.

It is an arithmetic number, because the mean of its divisors is an integer number (523197168).

Almost surely, 2^31312364208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31312364208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41855773440).

31312364208 is an abundant number, since it is smaller than the sum of its proper divisors (52399182672).

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

31312364208 is a wasteful number, since it uses less digits than its factorization.

31312364208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1141 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 31312364208 in words is "thirty-one billion, three hundred twelve million, three hundred sixty-four thousand, two hundred eight".