22915985 has 4 divisors (see below), whose sum is σ = 27499188. Its totient is φ = 18332784.

The previous prime is 22915973. The next prime is 22916009. The reversal of 22915985 is 58951922.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16785409 + 6130576 = 4097^2 + 2476^2 .

It is a cyclic number.

It is not a de Polignac number, because 22915985 - 2⁴ = 22915969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2291594 + ... + 2291603.

It is an arithmetic number, because the mean of its divisors is an integer number (6874797).

Almost surely, 2^22915985 is an apocalyptic number.

It is an amenable number.

22915985 is a deficient number, since it is larger than the sum of its proper divisors (4583203).

22915985 is an equidigital number, since it uses as much as digits as its factorization.

22915985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583202.

The product of its digits is 64800, while the sum is 41.

The square root of 22915985 is about 4787.0643404909. The cubic root of 22915985 is about 284.0400037876.

The spelling of 22915985 in words is "twenty-two million, nine hundred fifteen thousand, nine hundred eighty-five".