22815873 has 6 divisors (see below), whose sum is σ = 32956274. Its totient is φ = 15210576.

The previous prime is 22815869. The next prime is 22815883. The reversal of 22815873 is 37851822.

It can be written as a sum of positive squares in only one way, i.e., 20903184 + 1912689 = 4572^2 + 1383^2 .

It is not a de Polignac number, because 22815873 - 2² = 22815869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22815823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1267540 + ... + 1267557.

Almost surely, 2^22815873 is an apocalyptic number.

It is an amenable number.

22815873 is a deficient number, since it is larger than the sum of its proper divisors (10140401).

22815873 is a wasteful number, since it uses less digits than its factorization.

22815873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535103 (or 2535100 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 22815873 is about 4776.5963823627. The cubic root of 22815873 is about 283.6257758678.

The spelling of 22815873 in words is "twenty-two million, eight hundred fifteen thousand, eight hundred seventy-three".