31123680231 has 32 divisors (see below), whose sum is σ = 48586075648. Its totient is φ = 17351107200.

The previous prime is 31123680229. The next prime is 31123680253. The reversal of 31123680231 is 13208632113.

It is not a de Polignac number, because 31123680231 - 2¹ = 31123680229 is a prime.

It is a super-2 number, since 2×31123680231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123680271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 772281 + ... + 811581.

It is an arithmetic number, because the mean of its divisors is an integer number (1518314864).

Almost surely, 2^31123680231 is an apocalyptic number.

31123680231 is a deficient number, since it is larger than the sum of its proper divisors (17462395417).

31123680231 is a wasteful number, since it uses less digits than its factorization.

31123680231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40231.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 31123680231 in words is "thirty-one billion, one hundred twenty-three million, six hundred eighty thousand, two hundred thirty-one".