215422165 has 16 divisors (see below), whose sum is σ = 299600640. Its totient is φ = 145635840.

The previous prime is 215422153. The next prime is 215422201. The reversal of 215422165 is 561224512.

It is not a de Polignac number, because 215422165 - 2⁹ = 215421653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40860 + ... + 45829.

It is an arithmetic number, because the mean of its divisors is an integer number (18725040).

Almost surely, 2^215422165 is an apocalyptic number.

It is an amenable number.

215422165 is a deficient number, since it is larger than the sum of its proper divisors (84178475).

215422165 is an equidigital number, since it uses as much as digits as its factorization.

215422165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86772.

The product of its digits is 4800, while the sum is 28.

The square root of 215422165 is about 14677.2669458588. The cubic root of 215422165 is about 599.4644897828.

Adding to 215422165 its reverse (561224512), we get a palindrome (776646677).

The spelling of 215422165 in words is "two hundred fifteen million, four hundred twenty-two thousand, one hundred sixty-five".