22815473 has 4 divisors (see below), whose sum is σ = 23551488. Its totient is φ = 22079460.

The previous prime is 22815469. The next prime is 22815487. The reversal of 22815473 is 37451822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22815473 - 2² = 22815469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22815433) 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, 367961 + ... + 368022.

It is an arithmetic number, because the mean of its divisors is an integer number (5887872).

Almost surely, 2^22815473 is an apocalyptic number.

It is an amenable number.

22815473 is a deficient number, since it is larger than the sum of its proper divisors (736015).

22815473 is an equidigital number, since it uses as much as digits as its factorization.

22815473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736014.

The product of its digits is 13440, while the sum is 32.

The square root of 22815473 is about 4776.5545113607. The cubic root of 22815473 is about 283.6241183817.

The spelling of 22815473 in words is "twenty-two million, eight hundred fifteen thousand, four hundred seventy-three".