22542557 has 4 divisors (see below), whose sum is σ = 22591296. Its totient is φ = 22493820.

The previous prime is 22542547. The next prime is 22542577. The reversal of 22542557 is 75524522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22542557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22542547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23669 + ... + 24602.

It is an arithmetic number, because the mean of its divisors is an integer number (5647824).

Almost surely, 2^22542557 is an apocalyptic number.

It is an amenable number.

22542557 is a deficient number, since it is larger than the sum of its proper divisors (48739).

22542557 is an equidigital number, since it uses as much as digits as its factorization.

22542557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48738.

The product of its digits is 28000, while the sum is 32.

The square root of 22542557 is about 4747.9002727522. The cubic root of 22542557 is about 282.4886862099.

The spelling of 22542557 in words is "twenty-two million, five hundred forty-two thousand, five hundred fifty-seven".