815227 has 4 divisors (see below), whose sum is σ = 931696. Its totient is φ = 698760.

The previous prime is 815209. The next prime is 815231. The reversal of 815227 is 722518.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (815257) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 58224 + ... + 58237.

It is an arithmetic number, because the mean of its divisors is an integer number (232924).

2⁸¹⁵²²⁷ is an apocalyptic number.

815227 is a deficient number, since it is larger than the sum of its proper divisors (116469).

815227 is a wasteful number, since it uses less digits than its factorization.

815227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116468.

The product of its digits is 1120, while the sum is 25.

The square root of 815227 is about 902.8992191823. The cubic root of 815227 is about 93.4170578092.

The spelling of 815227 in words is "eight hundred fifteen thousand, two hundred twenty-seven".