22385557 has 4 divisors (see below), whose sum is σ = 22807980. Its totient is φ = 21963136.

The previous prime is 22385551. The next prime is 22385567. The reversal of 22385557 is 75558322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18096516 + 4289041 = 4254^2 + 2071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22385557 is a prime.

It is a super-2 number, since 2×22385557² = 1002226324400498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22385551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211132 + ... + 211237.

It is an arithmetic number, because the mean of its divisors is an integer number (5701995).

Almost surely, 2^22385557 is an apocalyptic number.

It is an amenable number.

22385557 is a deficient number, since it is larger than the sum of its proper divisors (422423).

22385557 is an equidigital number, since it uses as much as digits as its factorization.

22385557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422422.

The product of its digits is 84000, while the sum is 37.

The square root of 22385557 is about 4731.3377600844. The cubic root of 22385557 is about 281.8313504615.

The spelling of 22385557 in words is "twenty-two million, three hundred eighty-five thousand, five hundred fifty-seven".