22238657 has 4 divisors (see below), whose sum is σ = 25415616. Its totient is φ = 19061700.

The previous prime is 22238639. The next prime is 22238663. The reversal of 22238657 is 75683222.

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 22238657 - 2¹⁴ = 22222273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22238617) 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, 1588469 + ... + 1588482.

It is an arithmetic number, because the mean of its divisors is an integer number (6353904).

Almost surely, 2^22238657 is an apocalyptic number.

It is an amenable number.

22238657 is a deficient number, since it is larger than the sum of its proper divisors (3176959).

22238657 is an equidigital number, since it uses as much as digits as its factorization.

22238657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176958.

The product of its digits is 40320, while the sum is 35.

The square root of 22238657 is about 4715.7880571544. The cubic root of 22238657 is about 281.2135128304.

The spelling of 22238657 in words is "twenty-two million, two hundred thirty-eight thousand, six hundred fifty-seven".