22390131 has 4 divisors (see below), whose sum is σ = 29853512. Its totient is φ = 14926752.

The previous prime is 22390099. The next prime is 22390157. The reversal of 22390131 is 13109322.

It is a happy number.

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

It is not a de Polignac number, because 22390131 - 2⁵ = 22390099 is a prime.

It is a super-2 number, since 2×22390131² = 1002635932394322, 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 = 22390098 and 22390107.

It is not an unprimeable number, because it can be changed into a prime (22390171) 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, 3731686 + ... + 3731691.

It is an arithmetic number, because the mean of its divisors is an integer number (7463378).

Almost surely, 2^22390131 is an apocalyptic number.

22390131 is a deficient number, since it is larger than the sum of its proper divisors (7463381).

22390131 is an equidigital number, since it uses as much as digits as its factorization.

22390131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7463380.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 22390131 is about 4731.8211081993. The cubic root of 22390131 is about 281.8505445161.

Adding to 22390131 its reverse (13109322), we get a palindrome (35499453).

The spelling of 22390131 in words is "twenty-two million, three hundred ninety thousand, one hundred thirty-one".