22359521 has 2 divisors, whose sum is σ = 22359522. Its totient is φ = 22359520.

The previous prime is 22359517. The next prime is 22359529. The reversal of 22359521 is 12595322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21529600 + 829921 = 4640^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 22359521 - 2² = 22359517 is a prime.

It is not a weakly prime, because it can be changed into another prime (22359529) 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, 11179760 + 11179761.

It is an arithmetic number, because the mean of its divisors is an integer number (11179761).

Almost surely, 2^22359521 is an apocalyptic number.

It is an amenable number.

22359521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22359521 is an equidigital number, since it uses as much as digits as its factorization.

22359521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 22359521 is about 4728.5855178901. The cubic root of 22359521 is about 281.7220447507.

The spelling of 22359521 in words is "twenty-two million, three hundred fifty-nine thousand, five hundred twenty-one".