915664227 has 4 divisors (see below), whose sum is σ = 1220885640. Its totient is φ = 610442816.

The previous prime is 915664187. The next prime is 915664249. The reversal of 915664227 is 722466519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 722466519 = 3 ⋅240822173.

It is a cyclic number.

It is not a de Polignac number, because 915664227 - 2¹⁵ = 915631459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (915664027) 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, 152610702 + ... + 152610707.

It is an arithmetic number, because the mean of its divisors is an integer number (305221410).

Almost surely, 2^915664227 is an apocalyptic number.

915664227 is a deficient number, since it is larger than the sum of its proper divisors (305221413).

915664227 is a wasteful number, since it uses less digits than its factorization.

915664227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305221412.

The product of its digits is 181440, while the sum is 42.

The square root of 915664227 is about 30259.9442663069. The cubic root of 915664227 is about 971.0585485832.

The spelling of 915664227 in words is "nine hundred fifteen million, six hundred sixty-four thousand, two hundred twenty-seven".