31312112208 has 80 divisors (see below), whose sum is σ = 89137836480. Its totient is φ = 9410429952.

The previous prime is 31312112207. The next prime is 31312112281. The reversal of 31312112208 is 80221121313.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312112207) 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, 556653 + ... + 610316.

It is an arithmetic number, because the mean of its divisors is an integer number (1114222956).

Almost surely, 2^31312112208 is an apocalyptic number.

It is an amenable number.

31312112208 is an abundant number, since it is smaller than the sum of its proper divisors (57825724272).

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

31312112208 is a wasteful number, since it uses less digits than its factorization.

31312112208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167036 (or 1167030 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 31312112208 in words is "thirty-one billion, three hundred twelve million, one hundred twelve thousand, two hundred eight".