13365631 has 6 divisors (see below), whose sum is σ = 13701296. Its totient is φ = 13038000.

The previous prime is 13365623. The next prime is 13365637. The reversal of 13365631 is 13656331.

It is not a de Polignac number, because 13365631 - 2³ = 13365623 is a prime.

It is a super-2 number, since 2×13365631² = 357280184056322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13365631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13365637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2295 + ... + 5656.

Almost surely, 2^13365631 is an apocalyptic number.

13365631 is a deficient number, since it is larger than the sum of its proper divisors (335665).

13365631 is an frugal number, since it uses more digits than its factorization.

13365631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8033 (or 7992 counting only the distinct ones).

The product of its digits is 4860, while the sum is 28.

The square root of 13365631 is about 3655.9035818796. The cubic root of 13365631 is about 237.3175315003.

The spelling of 13365631 in words is "thirteen million, three hundred sixty-five thousand, six hundred thirty-one".