22815289 has 16 divisors (see below), whose sum is σ = 26707968. Its totient is φ = 19087632.

The previous prime is 22815283. The next prime is 22815307. The reversal of 22815289 is 98251822.

It is a cyclic number.

It is not a de Polignac number, because 22815289 - 2⁹ = 22814777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22815283) 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 15 ways as a sum of consecutive naturals, for example, 61984 + ... + 62350.

It is an arithmetic number, because the mean of its divisors is an integer number (1669248).

Almost surely, 2^22815289 is an apocalyptic number.

It is an amenable number.

22815289 is a deficient number, since it is larger than the sum of its proper divisors (3892679).

22815289 is a wasteful number, since it uses less digits than its factorization.

22815289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its digits is 23040, while the sum is 37.

The square root of 22815289 is about 4776.5352505765. The cubic root of 22815289 is about 283.6233559316.

It can be divided in two parts, 22815 and 289, that added together give a square (23104 = 152²).

The spelling of 22815289 in words is "twenty-two million, eight hundred fifteen thousand, two hundred eighty-nine".