22508887 has 2 divisors, whose sum is σ = 22508888. Its totient is φ = 22508886.

The previous prime is 22508879. The next prime is 22508897. The reversal of 22508887 is 78880522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22508887 - 2³ = 22508879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22508897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11254443 + 11254444.

It is an arithmetic number, because the mean of its divisors is an integer number (11254444).

Almost surely, 2^22508887 is an apocalyptic number.

22508887 is a deficient number, since it is larger than the sum of its proper divisors (1).

22508887 is an equidigital number, since it uses as much as digits as its factorization.

22508887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 22508887 is about 4744.3531698220. The cubic root of 22508887 is about 282.3479726037.

The spelling of 22508887 in words is "twenty-two million, five hundred eight thousand, eight hundred eighty-seven".