13238631 has 48 divisors (see below), whose sum is σ = 23721984. Its totient is φ = 6941952.

The previous prime is 13238627. The next prime is 13238633. The reversal of 13238631 is 13683231.

It is a happy number.

13238631 is a `hidden beast` number, since 1 + 3 + 23 + 8 + 631 = 666.

It is not a de Polignac number, because 13238631 - 2² = 13238627 is a prime.

It is a super-2 number, since 2×13238631² = 350522701508322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13238595 and 13238604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13238633) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50206 + ... + 50468.

It is an arithmetic number, because the mean of its divisors is an integer number (494208).

Almost surely, 2^13238631 is an apocalyptic number.

13238631 is a deficient number, since it is larger than the sum of its proper divisors (10483353).

13238631 is a wasteful number, since it uses less digits than its factorization.

13238631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 337 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 13238631 is about 3638.4929572558. The cubic root of 13238631 is about 236.5634756993.

The spelling of 13238631 in words is "thirteen million, two hundred thirty-eight thousand, six hundred thirty-one".