22508 has 12 divisors (see below), whose sum is σ = 41832. Its totient is φ = 10560.

The previous prime is 22501. The next prime is 22511. The reversal of 22508 is 80522.

It is a happy number.

It is a super-2 number, since 2×22508² = 1013220128, which contains 22 as substring.

It is a hoax number, since the sum of its digits (17) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an Ulam number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (22501) by changing a digit.

22508 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98 + ... + 233.

It is an arithmetic number, because the mean of its divisors is an integer number (3486).

2²²⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

22508 is a deficient number, since it is larger than the sum of its proper divisors (19324).

22508 is a wasteful number, since it uses less digits than its factorization.

22508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 22508 is about 150.0266642967. The cubic root of 22508 is about 28.2344263758.

The spelling of 22508 in words is "twenty-two thousand, five hundred eight".