22808557 has 2 divisors, whose sum is σ = 22808558. Its totient is φ = 22808556.

The previous prime is 22808519. The next prime is 22808567. The reversal of 22808557 is 75580822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20331081 + 2477476 = 4509^2 + 1574^2 .

It is a cyclic number.

It is not a de Polignac number, because 22808557 - 2¹⁵ = 22775789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22808507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11404278 + 11404279.

It is an arithmetic number, because the mean of its divisors is an integer number (11404279).

Almost surely, 2^22808557 is an apocalyptic number.

It is an amenable number.

22808557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22808557 is an equidigital number, since it uses as much as digits as its factorization.

22808557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 22808557 is about 4775.8305036925. The cubic root of 22808557 is about 283.5954573844.

The spelling of 22808557 in words is "twenty-two million, eight hundred eight thousand, five hundred fifty-seven".