22498257 has 16 divisors (see below), whose sum is σ = 31028672. Its totient is φ = 14489280.

The previous prime is 22498243. The next prime is 22498271. The reversal of 22498257 is 75289422.

It is an interprime number because it is at equal distance from previous prime (22498243) and next prime (22498271).

It is not a de Polignac number, because 22498257 - 2⁸ = 22498001 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22498207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16782 + ... + 18072.

It is an arithmetic number, because the mean of its divisors is an integer number (1939292).

Almost surely, 2^22498257 is an apocalyptic number.

22498257 is the 3873-rd pentagonal number.

It is an amenable number.

22498257 is a deficient number, since it is larger than the sum of its proper divisors (8530415).

22498257 is a wasteful number, since it uses less digits than its factorization.

22498257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488.

The product of its digits is 80640, while the sum is 39.

The square root of 22498257 is about 4743.2327583622. The cubic root of 22498257 is about 282.3035185836.

The spelling of 22498257 in words is "twenty-two million, four hundred ninety-eight thousand, two hundred fifty-seven".