22287857 has 2 divisors, whose sum is σ = 22287858. Its totient is φ = 22287856.

The previous prime is 22287847. The next prime is 22287871. The reversal of 22287857 is 75878222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22287841 + 16 = 4721^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 22287857 - 2¹⁰ = 22286833 is a prime.

It is not a weakly prime, because it can be changed into another prime (22287847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11143928 + 11143929.

It is an arithmetic number, because the mean of its divisors is an integer number (11143929).

Almost surely, 2^22287857 is an apocalyptic number.

It is an amenable number.

22287857 is a deficient number, since it is larger than the sum of its proper divisors (1).

22287857 is an equidigital number, since it uses as much as digits as its factorization.

22287857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 41.

The square root of 22287857 is about 4721.0016945559. The cubic root of 22287857 is about 281.4207422830.

The spelling of 22287857 in words is "twenty-two million, two hundred eighty-seven thousand, eight hundred fifty-seven".