22530 has 16 divisors (see below), whose sum is σ = 54144. Its totient is φ = 6000.

The previous prime is 22511. The next prime is 22531. The reversal of 22530 is 3522.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22531) by changing a digit.

22530 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 7 ways as a sum of consecutive naturals, for example, 346 + ... + 405.

It is an arithmetic number, because the mean of its divisors is an integer number (3384).

2²²⁵³⁰ is an apocalyptic number.

22530 is an abundant number, since it is smaller than the sum of its proper divisors (31614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27072).

22530 is a wasteful number, since it uses less digits than its factorization.

22530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761.

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 22530 is about 150.0999666889. The cubic root of 22530 is about 28.2436224411.

The spelling of 22530 in words is "twenty-two thousand, five hundred thirty".