22565167930421 has 2 divisors, whose sum is σ = 22565167930422. Its totient is φ = 22565167930420.

The previous prime is 22565167930411. The next prime is 22565167930439. The reversal of 22565167930421 is 12403976156522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12046244392900 + 10518923537521 = 3470770^2 + 3243289^2 .

It is a cyclic number.

It is not a de Polignac number, because 22565167930421 - 2²² = 22565163736117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22565167930411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11282583965210 + 11282583965211.

It is an arithmetic number, because the mean of its divisors is an integer number (11282583965211).

Almost surely, 2^{22565167930421} is an apocalyptic number.

It is an amenable number.

22565167930421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22565167930421 is an equidigital number, since it uses as much as digits as its factorization.

22565167930421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 22565167930421 in words is "twenty-two trillion, five hundred sixty-five billion, one hundred sixty-seven million, nine hundred thirty thousand, four hundred twenty-one".