22465621 has 2 divisors, whose sum is σ = 22465622. Its totient is φ = 22465620.

The previous prime is 22465609. The next prime is 22465637. The reversal of 22465621 is 12656422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18584721 + 3880900 = 4311^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 22465621 - 2⁵ = 22465589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22465621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22465661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11232810 + 11232811.

It is an arithmetic number, because the mean of its divisors is an integer number (11232811).

Almost surely, 2^22465621 is an apocalyptic number.

It is an amenable number.

22465621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22465621 is an equidigital number, since it uses as much as digits as its factorization.

22465621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 22465621 is about 4739.7912401286. The cubic root of 22465621 is about 282.1669492463.

The spelling of 22465621 in words is "twenty-two million, four hundred sixty-five thousand, six hundred twenty-one".