22257999 has 12 divisors (see below), whose sum is σ = 32278896. Its totient is φ = 14779392.

The previous prime is 22257971. The next prime is 22258001. The reversal of 22257999 is 99975222.

It is a happy number.

It is not a de Polignac number, because 22257999 - 2⁵ = 22257967 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22257929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2499 + ... + 7124.

It is an arithmetic number, because the mean of its divisors is an integer number (2689908).

Almost surely, 2^22257999 is an apocalyptic number.

22257999 is a deficient number, since it is larger than the sum of its proper divisors (10020897).

22257999 is a wasteful number, since it uses less digits than its factorization.

22257999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9886 (or 9883 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 22257999 is about 4717.8383821407. The cubic root of 22257999 is about 281.2950173866.

The spelling of 22257999 in words is "twenty-two million, two hundred fifty-seven thousand, nine hundred ninety-nine".