13402131 has 4 divisors (see below), whose sum is σ = 17869512. Its totient is φ = 8934752.

The previous prime is 13402099. The next prime is 13402133. The reversal of 13402131 is 13120431.

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 13402131 - 2⁵ = 13402099 is a prime.

It is a super-2 number, since 2×13402131² = 359234230682322, 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 13402131.

It is not an unprimeable number, because it can be changed into a prime (13402133) 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, 2233686 + ... + 2233691.

It is an arithmetic number, because the mean of its divisors is an integer number (4467378).

Almost surely, 2^13402131 is an apocalyptic number.

13402131 is a deficient number, since it is larger than the sum of its proper divisors (4467381).

13402131 is an equidigital number, since it uses as much as digits as its factorization.

13402131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467380.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13402131 is about 3660.8921043920. The cubic root of 13402131 is about 237.5333641032.

Adding to 13402131 its reverse (13120431), we get a palindrome (26522562).

The spelling of 13402131 in words is "thirteen million, four hundred two thousand, one hundred thirty-one".