22712457 has 4 divisors (see below), whose sum is σ = 30283280. Its totient is φ = 15141636.

The previous prime is 22712447. The next prime is 22712489. The reversal of 22712457 is 75421722.

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 not a de Polignac number, because 22712457 - 2⁴ = 22712441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22712447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3785407 + ... + 3785412.

It is an arithmetic number, because the mean of its divisors is an integer number (7570820).

Almost surely, 2^22712457 is an apocalyptic number.

It is an amenable number.

22712457 is a deficient number, since it is larger than the sum of its proper divisors (7570823).

22712457 is an equidigital number, since it uses as much as digits as its factorization.

22712457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7570822.

The product of its digits is 7840, while the sum is 30.

The square root of 22712457 is about 4765.7588063183. The cubic root of 22712457 is about 283.1966028471.

The spelling of 22712457 in words is "twenty-two million, seven hundred twelve thousand, four hundred fifty-seven".