22508009 has 2 divisors, whose sum is σ = 22508010. Its totient is φ = 22508008.

The previous prime is 22507981. The next prime is 22508021. The reversal of 22508009 is 90080522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 3888784 = 4315^2 + 1972^2 .

It is a cyclic number.

It is not a de Polignac number, because 22508009 - 2⁸ = 22507753 is a prime.

It is a super-2 number, since 2×22508009² = 1013220938288162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22508039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11254004 + 11254005.

It is an arithmetic number, because the mean of its divisors is an integer number (11254005).

Almost surely, 2^22508009 is an apocalyptic number.

It is an amenable number.

22508009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22508009 is an equidigital number, since it uses as much as digits as its factorization.

22508009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 22508009 is about 4744.2606378655. The cubic root of 22508009 is about 282.3443013909.

The spelling of 22508009 in words is "twenty-two million, five hundred eight thousand, nine".