22561951 has 2 divisors, whose sum is σ = 22561952. Its totient is φ = 22561950.

The previous prime is 22561943. The next prime is 22561961. The reversal of 22561951 is 15916522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22561951 - 2³ = 22561943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22561961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11280975 + 11280976.

It is an arithmetic number, because the mean of its divisors is an integer number (11280976).

Almost surely, 2^22561951 is an apocalyptic number.

22561951 is a deficient number, since it is larger than the sum of its proper divisors (1).

22561951 is an equidigital number, since it uses as much as digits as its factorization.

22561951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 22561951 is about 4749.9422101748. The cubic root of 22561951 is about 282.5696739938.

The spelling of 22561951 in words is "twenty-two million, five hundred sixty-one thousand, nine hundred fifty-one".