31000021096 has 32 divisors (see below), whose sum is σ = 65122901280. Its totient is φ = 13710081600.

The previous prime is 31000021081. The next prime is 31000021139. The reversal of 31000021096 is 69012000013.

It is a super-2 number, since 2×31000021096² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4757190 + ... + 4763701.

It is an arithmetic number, because the mean of its divisors is an integer number (2035090665).

Almost surely, 2^31000021096 is an apocalyptic number.

It is an amenable number.

31000021096 is an abundant number, since it is smaller than the sum of its proper divisors (34122880184).

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

31000021096 is a wasteful number, since it uses less digits than its factorization.

31000021096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520945 (or 9520941 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 31000021096 in words is "thirty-one billion, twenty-one thousand, ninety-six".