815228869 has 16 divisors (see below), whose sum is σ = 1004104192. Its totient is φ = 644537088.

The previous prime is 815228861. The next prime is 815228893. The reversal of 815228869 is 968822518.

It is not a de Polignac number, because 815228869 - 2³ = 815228861 is a prime.

It is a super-2 number, since 2×815228869² = 1329196217702038322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815228861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168052 + ... + 172834.

It is an arithmetic number, because the mean of its divisors is an integer number (62756512).

Almost surely, 2^815228869 is an apocalyptic number.

It is an amenable number.

815228869 is a deficient number, since it is larger than the sum of its proper divisors (188875323).

815228869 is a wasteful number, since it uses less digits than its factorization.

815228869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6676.

The product of its digits is 552960, while the sum is 49.

The square root of 815228869 is about 28552.2130315673. The cubic root of 815228869 is about 934.1712919885.

The spelling of 815228869 in words is "eight hundred fifteen million, two hundred twenty-eight thousand, eight hundred sixty-nine".