31123090008 has 48 divisors (see below), whose sum is σ = 84300606000. Its totient is φ = 10373267520.

The previous prime is 31123090007. The next prime is 31123090109. The reversal of 31123090008 is 80009032113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123090003) 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, 948598 + ... + 980858.

It is an arithmetic number, because the mean of its divisors is an integer number (1756262625).

Almost surely, 2^31123090008 is an apocalyptic number.

It is an amenable number.

31123090008 is an abundant number, since it is smaller than the sum of its proper divisors (53177515992).

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

31123090008 is a wasteful number, since it uses less digits than its factorization.

31123090008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45672 (or 45665 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 31123090008 in words is "thirty-one billion, one hundred twenty-three million, ninety thousand, eight".