22287915 has 48 divisors (see below), whose sum is σ = 42981120. Its totient is φ = 10609920.

The previous prime is 22287871. The next prime is 22287929. The reversal of 22287915 is 51978222.

It is not a de Polignac number, because 22287915 - 2⁸ = 22287659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22287915.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 17521 + ... + 18749.

It is an arithmetic number, because the mean of its divisors is an integer number (895440).

Almost surely, 2^22287915 is an apocalyptic number.

22287915 is a deficient number, since it is larger than the sum of its proper divisors (20693205).

22287915 is a wasteful number, since it uses less digits than its factorization.

22287915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284 (or 1281 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 22287915 is about 4721.0078373161. The cubic root of 22287915 is about 281.4209863978.

The spelling of 22287915 in words is "twenty-two million, two hundred eighty-seven thousand, nine hundred fifteen".