22256131 has 4 divisors (see below), whose sum is σ = 22676112. Its totient is φ = 21836152.

The previous prime is 22256123. The next prime is 22256189. The reversal of 22256131 is 13165222.

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 22256131 - 2³ = 22256123 is a prime.

It is a super-2 number, since 2×22256131² = 990670734178322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22256231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209911 + ... + 210016.

It is an arithmetic number, because the mean of its divisors is an integer number (5669028).

Almost surely, 2^22256131 is an apocalyptic number.

22256131 is a deficient number, since it is larger than the sum of its proper divisors (419981).

22256131 is an equidigital number, since it uses as much as digits as its factorization.

22256131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419980.

The product of its digits is 720, while the sum is 22.

The square root of 22256131 is about 4717.6404059657. The cubic root of 22256131 is about 281.2871479492.

Subtracting from 22256131 its reverse (13165222), we obtain a palindrome (9090909).

The spelling of 22256131 in words is "twenty-two million, two hundred fifty-six thousand, one hundred thirty-one".