22557081 has 12 divisors (see below), whose sum is σ = 30368688. Its totient is φ = 14892984.

The previous prime is 22557071. The next prime is 22557121. The reversal of 22557081 is 18075522.

It is not a de Polignac number, because 22557081 - 2¹⁹ = 22032793 is a prime.

It is a super-2 number, since 2×22557081² = 1017643806481122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22557001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79566 + ... + 79848.

It is an arithmetic number, because the mean of its divisors is an integer number (2530724).

Almost surely, 2^22557081 is an apocalyptic number.

It is an amenable number.

22557081 is a deficient number, since it is larger than the sum of its proper divisors (7811607).

22557081 is an equidigital number, since it uses as much as digits as its factorization.

22557081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 22557081 is about 4749.4295446927. The cubic root of 22557081 is about 282.5493416308.

The spelling of 22557081 in words is "twenty-two million, five hundred fifty-seven thousand, eighty-one".