215222915 has 16 divisors (see below), whose sum is σ = 262245600. Its totient is φ = 169542912.

The previous prime is 215222897. The next prime is 215222927. The reversal of 215222915 is 519222512.

It is a cyclic number.

It is not a de Polignac number, because 215222915 - 2¹⁴ = 215206531 is a prime.

It is an unprimeable number.

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, 125081 + ... + 126789.

It is an arithmetic number, because the mean of its divisors is an integer number (16390350).

Almost surely, 2^215222915 is an apocalyptic number.

215222915 is a deficient number, since it is larger than the sum of its proper divisors (47022685).

215222915 is a wasteful number, since it uses less digits than its factorization.

215222915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086.

The product of its digits is 3600, while the sum is 29.

The square root of 215222915 is about 14670.4776677517. The cubic root of 215222915 is about 599.2796122672.

The spelling of 215222915 in words is "two hundred fifteen million, two hundred twenty-two thousand, nine hundred fifteen".