22085287 has 4 divisors (see below), whose sum is σ = 25240336. Its totient is φ = 18930240.

The previous prime is 22085281. The next prime is 22085291. The reversal of 22085287 is 78258022.

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

It is not a de Polignac number, because 22085287 - 2³ = 22085279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22085281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577514 + ... + 1577527.

It is an arithmetic number, because the mean of its divisors is an integer number (6310084).

Almost surely, 2^22085287 is an apocalyptic number.

22085287 is a deficient number, since it is larger than the sum of its proper divisors (3155049).

22085287 is an equidigital number, since it uses as much as digits as its factorization.

22085287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155048.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 22085287 is about 4699.4985902753. The cubic root of 22085287 is about 280.5655533360.

The spelling of 22085287 in words is "twenty-two million, eighty-five thousand, two hundred eighty-seven".