13613231631 has 16 divisors (see below), whose sum is σ = 18563821056. Its totient is φ = 8870368416.

The previous prime is 13613231609. The next prime is 13613231641.

13613231631 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13613231631 - 2⁷ = 13613231503 is a prime.

It is a super-2 number, since 2×13613231631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13613231641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 120955 + ... + 204588.

It is an arithmetic number, because the mean of its divisors is an integer number (1160238816).

Almost surely, 2^13613231631 is an apocalyptic number.

13613231631 is a deficient number, since it is larger than the sum of its proper divisors (4950589425).

13613231631 is a wasteful number, since it uses less digits than its factorization.

13613231631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325862.

The product of its digits is 5832, while the sum is 30.

The spelling of 13613231631 in words is "thirteen billion, six hundred thirteen million, two hundred thirty-one thousand, six hundred thirty-one".