139311526631 has 4 divisors (see below), whose sum is σ = 145368549552. Its totient is φ = 133254503712.

The previous prime is 139311526583. The next prime is 139311526637. The reversal of 139311526631 is 136625113931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139311526631 - 2²² = 139307332327 is a prime.

It is a super-2 number, since 2×139311526631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139311526637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3028511426 + ... + 3028511471.

It is an arithmetic number, because the mean of its divisors is an integer number (36342137388).

Almost surely, 2^139311526631 is an apocalyptic number.

139311526631 is a deficient number, since it is larger than the sum of its proper divisors (6057022921).

139311526631 is an equidigital number, since it uses as much as digits as its factorization.

139311526631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6057022920.

The product of its digits is 87480, while the sum is 41.

The spelling of 139311526631 in words is "one hundred thirty-nine billion, three hundred eleven million, five hundred twenty-six thousand, six hundred thirty-one".