22045287 has 24 divisors (see below), whose sum is σ = 32856192. Its totient is φ = 13036800.

The previous prime is 22045279. The next prime is 22045333. The reversal of 22045287 is 78254022.

It is not a de Polignac number, because 22045287 - 2³ = 22045279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22045207) 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 23 ways as a sum of consecutive naturals, for example, 227223 + ... + 227319.

It is an arithmetic number, because the mean of its divisors is an integer number (1369008).

Almost surely, 2^22045287 is an apocalyptic number.

22045287 is a deficient number, since it is larger than the sum of its proper divisors (10810905).

22045287 is an equidigital number, since it uses as much as digits as its factorization.

22045287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 22045287 is about 4695.2408883890. The cubic root of 22045287 is about 280.3960678880.

The spelling of 22045287 in words is "twenty-two million, forty-five thousand, two hundred eighty-seven".