22530287 has 16 divisors (see below), whose sum is σ = 25980192. Its totient is φ = 19353600.

The previous prime is 22530283. The next prime is 22530301. The reversal of 22530287 is 78203522.

It is a cyclic number.

It is not a de Polignac number, because 22530287 - 2² = 22530283 is a prime.

It is a super-2 number, since 2×22530287² = 1015227664604738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22530283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20912 + ... + 21962.

It is an arithmetic number, because the mean of its divisors is an integer number (1623762).

Almost surely, 2^22530287 is an apocalyptic number.

22530287 is a deficient number, since it is larger than the sum of its proper divisors (3449905).

22530287 is a wasteful number, since it uses less digits than its factorization.

22530287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 22530287 is about 4746.6079467342. The cubic root of 22530287 is about 282.4374236839.

The spelling of 22530287 in words is "twenty-two million, five hundred thirty thousand, two hundred eighty-seven".