13611631 has 8 divisors (see below), whose sum is σ = 15211728. Its totient is φ = 12072000.

The previous prime is 13611613. The next prime is 13611659.

It is a happy number.

13611631 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13611631 - 2⁵ = 13611599 is a prime.

It is a super-2 number, since 2×13611631² = 370552996960322, which 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 (13611691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14640 + ... + 15541.

It is an arithmetic number, because the mean of its divisors is an integer number (1901466).

Almost surely, 2^13611631 is an apocalyptic number.

13611631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13611631 is a deficient number, since it is larger than the sum of its proper divisors (1600097).

13611631 is a wasteful number, since it uses less digits than its factorization.

13611631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30233.

The product of its digits is 324, while the sum is 22.

The square root of 13611631 is about 3689.3943947483. The cubic root of 13611631 is about 238.7646650897.

It can be divided in two parts, 1361 and 1631, that added together give a palindrome (2992).

The spelling of 13611631 in words is "thirteen million, six hundred eleven thousand, six hundred thirty-one".