31011312208 has 40 divisors (see below), whose sum is σ = 61116041448. Its totient is φ = 15240886272.

The previous prime is 31011312193. The next prime is 31011312209. The reversal of 31011312208 is 80221311013.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24164080704 + 6847231504 = 155448^2 + 82748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011312209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296916 + ... + 387532.

Almost surely, 2^31011312208 is an apocalyptic number.

It is an amenable number.

31011312208 is a deficient number, since it is larger than the sum of its proper divisors (30104729240).

31011312208 is a wasteful number, since it uses less digits than its factorization.

31011312208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90991 (or 90985 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 31011312208 in words is "thirty-one billion, eleven million, three hundred twelve thousand, two hundred eight".