22497 has 4 divisors (see below), whose sum is σ = 30000. Its totient is φ = 14996.

The previous prime is 22483. The next prime is 22501. The reversal of 22497 is 79422.

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 22497 - 2⁴ = 22481 is a prime.

It is a super-2 number, since 2×22497² = 1012230018, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (22447) 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, 3747 + ... + 3752.

It is an arithmetic number, because the mean of its divisors is an integer number (7500).

2²²⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

22497 is a deficient number, since it is larger than the sum of its proper divisors (7503).

22497 is an equidigital number, since it uses as much as digits as its factorization.

22497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7502.

The product of its digits is 1008, while the sum is 24.

The square root of 22497 is about 149.9899996666. The cubic root of 22497 is about 28.2298260960.

It can be divided in two parts, 2 and 2497, that multiplied together give a palindrome (4994).

The spelling of 22497 in words is "twenty-two thousand, four hundred ninety-seven".