31007872238 has 16 divisors (see below), whose sum is σ = 53170704384. Its totient is φ = 13285500120.

The previous prime is 31007872223. The next prime is 31007872241. The reversal of 31007872238 is 83227870013.

It is a super-2 number, since 2×31007872238² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31007872195 and 31007872204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244958 + ... + 349313.

It is an arithmetic number, because the mean of its divisors is an integer number (3323169024).

Almost surely, 2^31007872238 is an apocalyptic number.

31007872238 is a deficient number, since it is larger than the sum of its proper divisors (22162832146).

31007872238 is a wasteful number, since it uses less digits than its factorization.

31007872238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598007.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 31007872238 in words is "thirty-one billion, seven million, eight hundred seventy-two thousand, two hundred thirty-eight".