16390131 has 4 divisors (see below), whose sum is σ = 21853512. Its totient is φ = 10926752.

The previous prime is 16390123. The next prime is 16390163. The reversal of 16390131 is 13109361.

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 16390131 - 2³ = 16390123 is a prime.

It is a super-2 number, since 2×16390131² = 537272788394322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16390111) 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, 2731686 + ... + 2731691.

It is an arithmetic number, because the mean of its divisors is an integer number (5463378).

Almost surely, 2^16390131 is an apocalyptic number.

16390131 is a deficient number, since it is larger than the sum of its proper divisors (5463381).

16390131 is an equidigital number, since it uses as much as digits as its factorization.

16390131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463380.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 16390131 is about 4048.4726749726. The cubic root of 16390131 is about 254.0158452099.

Adding to 16390131 its reverse (13109361), we get a palindrome (29499492).

The spelling of 16390131 in words is "sixteen million, three hundred ninety thousand, one hundred thirty-one".