22961621 has 2 divisors, whose sum is σ = 22961622. Its totient is φ = 22961620.

The previous prime is 22961597. The next prime is 22961629. The reversal of 22961621 is 12616922.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19483396 + 3478225 = 4414^2 + 1865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22961621 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (22961629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11480810 + 11480811.

It is an arithmetic number, because the mean of its divisors is an integer number (11480811).

Almost surely, 2^22961621 is an apocalyptic number.

It is an amenable number.

22961621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22961621 is an equidigital number, since it uses as much as digits as its factorization.

22961621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 22961621 is about 4791.8285653809. The cubic root of 22961621 is about 284.2284290933.

The spelling of 22961621 in words is "twenty-two million, nine hundred sixty-one thousand, six hundred twenty-one".