22590509 has 2 divisors, whose sum is σ = 22590510. Its totient is φ = 22590508.

The previous prime is 22590499. The next prime is 22590511. The reversal of 22590509 is 90509522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19386409 + 3204100 = 4403^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 22590509 - 2¹² = 22586413 is a prime.

Together with 22590511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22590559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11295254 + 11295255.

It is an arithmetic number, because the mean of its divisors is an integer number (11295255).

Almost surely, 2^22590509 is an apocalyptic number.

It is an amenable number.

22590509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22590509 is an equidigital number, since it uses as much as digits as its factorization.

22590509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 22590509 is about 4752.9474013500. The cubic root of 22590509 is about 282.6888454610.

The spelling of 22590509 in words is "twenty-two million, five hundred ninety thousand, five hundred nine".