22598665 has 4 divisors (see below), whose sum is σ = 27118404. Its totient is φ = 18078928.

The previous prime is 22598647. The next prime is 22598669. The reversal of 22598665 is 56689522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56689522 = 2 ⋅28344761.

It can be written as a sum of positive squares in 2 ways, for example, as 8737936 + 13860729 = 2956^2 + 3723^2 .

It is a cyclic number.

It is not a de Polignac number, because 22598665 - 2⁹ = 22598153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22598669) 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, 2259862 + ... + 2259871.

It is an arithmetic number, because the mean of its divisors is an integer number (6779601).

Almost surely, 2^22598665 is an apocalyptic number.

It is an amenable number.

22598665 is a deficient number, since it is larger than the sum of its proper divisors (4519739).

22598665 is an equidigital number, since it uses as much as digits as its factorization.

22598665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519738.

The product of its digits is 259200, while the sum is 43.

The square root of 22598665 is about 4753.8053178480. The cubic root of 22598665 is about 282.7228617051.

The spelling of 22598665 in words is "twenty-two million, five hundred ninety-eight thousand, six hundred sixty-five".