13831631 has 6 divisors (see below), whose sum is σ = 15203496. Its totient is φ = 12574100.

The previous prime is 13831627. The next prime is 13831633. The reversal of 13831631 is 13613831.

It is a happy number.

It is not a de Polignac number, because 13831631 - 2² = 13831627 is a prime.

It is a super-2 number, since 2×13831631² = 382628032240322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13831631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13831633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57035 + ... + 57276.

It is an arithmetic number, because the mean of its divisors is an integer number (2533916).

Almost surely, 2^13831631 is an apocalyptic number.

13831631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13831631 is a deficient number, since it is larger than the sum of its proper divisors (1371865).

13831631 is a wasteful number, since it uses less digits than its factorization.

13831631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114333 (or 114322 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 13831631 is about 3719.0900768871. The cubic root of 13831631 is about 240.0441527564.

The spelling of 13831631 in words is "thirteen million, eight hundred thirty-one thousand, six hundred thirty-one".