22965821 has 2 divisors, whose sum is σ = 22965822. Its totient is φ = 22965820.

The previous prime is 22965779. The next prime is 22965841. The reversal of 22965821 is 12856922.

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., 22905796 + 60025 = 4786^2 + 245^2 .

It is a cyclic number.

It is not a de Polignac number, because 22965821 - 2¹⁸ = 22703677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22965841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11482910 + 11482911.

It is an arithmetic number, because the mean of its divisors is an integer number (11482911).

Almost surely, 2^22965821 is an apocalyptic number.

It is an amenable number.

22965821 is a deficient number, since it is larger than the sum of its proper divisors (1).

22965821 is an equidigital number, since it uses as much as digits as its factorization.

22965821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 22965821 is about 4792.2667914047. The cubic root of 22965821 is about 284.2457578151.

The spelling of 22965821 in words is "twenty-two million, nine hundred sixty-five thousand, eight hundred twenty-one".