22257347 has 4 divisors (see below), whose sum is σ = 25436976. Its totient is φ = 19077720.

The previous prime is 22257343. The next prime is 22257401. The reversal of 22257347 is 74375222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74375222 = 2 ⋅37187611.

It is a cyclic number.

It is not a de Polignac number, because 22257347 - 2² = 22257343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22257343) 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, 1589804 + ... + 1589817.

It is an arithmetic number, because the mean of its divisors is an integer number (6359244).

Almost surely, 2^22257347 is an apocalyptic number.

22257347 is a deficient number, since it is larger than the sum of its proper divisors (3179629).

22257347 is an equidigital number, since it uses as much as digits as its factorization.

22257347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179628.

The product of its digits is 23520, while the sum is 32.

The square root of 22257347 is about 4717.7692821926. The cubic root of 22257347 is about 281.2922707165.

The spelling of 22257347 in words is "twenty-two million, two hundred fifty-seven thousand, three hundred forty-seven".