13631131 has 4 divisors (see below), whose sum is σ = 14101200. Its totient is φ = 13161064.

The previous prime is 13631117. The next prime is 13631143. The reversal of 13631131 is 13113631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13631131 - 2⁵ = 13631099 is a prime.

It is a super-2 number, since 2×13631131² = 371615464678322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13631099 and 13631108.

It is not an unprimeable number, because it can be changed into a prime (13631171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234991 + ... + 235048.

It is an arithmetic number, because the mean of its divisors is an integer number (3525300).

Almost surely, 2^13631131 is an apocalyptic number.

13631131 is a deficient number, since it is larger than the sum of its proper divisors (470069).

13631131 is an equidigital number, since it uses as much as digits as its factorization.

13631131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470068.

The product of its digits is 162, while the sum is 19.

The square root of 13631131 is about 3692.0361590862. The cubic root of 13631131 is about 238.8786286401.

Adding to 13631131 its reverse (13113631), we get a palindrome (26744762).

The spelling of 13631131 in words is "thirteen million, six hundred thirty-one thousand, one hundred thirty-one".