22551131 has 2 divisors, whose sum is σ = 22551132. Its totient is φ = 22551130.

The previous prime is 22551127. The next prime is 22551149. The reversal of 22551131 is 13115522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22551131 - 2² = 22551127 is a prime.

It is a super-2 number, since 2×22551131² = 1017107018758322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22551101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11275565 + 11275566.

It is an arithmetic number, because the mean of its divisors is an integer number (11275566).

Almost surely, 2^22551131 is an apocalyptic number.

22551131 is a deficient number, since it is larger than the sum of its proper divisors (1).

22551131 is an equidigital number, since it uses as much as digits as its factorization.

22551131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300, while the sum is 20.

The square root of 22551131 is about 4748.8031123642. The cubic root of 22551131 is about 282.5244962704.

Adding to 22551131 its reverse (13115522), we get a palindrome (35666653).

The spelling of 22551131 in words is "twenty-two million, five hundred fifty-one thousand, one hundred thirty-one".