22507 has 4 divisors (see below), whose sum is σ = 22896. Its totient is φ = 22120.

The previous prime is 22501. The next prime is 22511. The reversal of 22507 is 70522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22507 is a prime.

It is a Duffinian number.

22507 is a lucky number.

It is a plaindrome in base 9.

It is a zygodrome in base 9.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88 + ... + 229.

It is an arithmetic number, because the mean of its divisors is an integer number (5724).

2²²⁵⁰⁷ is an apocalyptic number.

22507 is a deficient number, since it is larger than the sum of its proper divisors (389).

22507 is an equidigital number, since it uses as much as digits as its factorization.

22507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388.

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 22507 is about 150.0233315188. The cubic root of 22507 is about 28.2340082305.

It can be divided in two parts, 22 and 507, that added together give a square (529 = 23²).

The spelling of 22507 in words is "twenty-two thousand, five hundred seven".