22256857 has 4 divisors (see below), whose sum is σ = 25436416. Its totient is φ = 19077300.

The previous prime is 22256851. The next prime is 22256879. The reversal of 22256857 is 75865222.

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 not a de Polignac number, because 22256857 - 2³ = 22256849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22256851) 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, 1589769 + ... + 1589782.

It is an arithmetic number, because the mean of its divisors is an integer number (6359104).

Almost surely, 2^22256857 is an apocalyptic number.

It is an amenable number.

22256857 is a deficient number, since it is larger than the sum of its proper divisors (3179559).

22256857 is an equidigital number, since it uses as much as digits as its factorization.

22256857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179558.

The product of its digits is 67200, while the sum is 37.

The square root of 22256857 is about 4717.7173505839. The cubic root of 22256857 is about 281.2902064659.

The spelling of 22256857 in words is "twenty-two million, two hundred fifty-six thousand, eight hundred fifty-seven".