22397215 has 4 divisors (see below), whose sum is σ = 26876664. Its totient is φ = 17917768.

The previous prime is 22397197. The next prime is 22397227. The reversal of 22397215 is 51279322.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22397215 - 2⁵ = 22397183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2239717 + ... + 2239726.

It is an arithmetic number, because the mean of its divisors is an integer number (6719166).

Almost surely, 2^22397215 is an apocalyptic number.

22397215 is a deficient number, since it is larger than the sum of its proper divisors (4479449).

22397215 is an equidigital number, since it uses as much as digits as its factorization.

22397215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4479448.

The product of its digits is 7560, while the sum is 31.

The square root of 22397215 is about 4732.5695980091. The cubic root of 22397215 is about 281.8802662228.

The spelling of 22397215 in words is "twenty-two million, three hundred ninety-seven thousand, two hundred fifteen".