815228415 has 32 divisors (see below), whose sum is σ = 1454996160. Its totient is φ = 433078272.

The previous prime is 815228377. The next prime is 815228423. The reversal of 815228415 is 514822518.

815228415 is a `hidden beast` number, since 8 + 15 + 228 + 415 = 666.

It is not a de Polignac number, because 815228415 - 2¹¹ = 815226367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 815228415.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22947 + ... + 46443.

It is an arithmetic number, because the mean of its divisors is an integer number (45468630).

Almost surely, 2^815228415 is an apocalyptic number.

815228415 is a deficient number, since it is larger than the sum of its proper divisors (639767745).

815228415 is a wasteful number, since it uses less digits than its factorization.

815228415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23768 (or 23762 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 815228415 is about 28552.2050812192. The cubic root of 815228415 is about 934.1711185755.

The spelling of 815228415 in words is "eight hundred fifteen million, two hundred twenty-eight thousand, four hundred fifteen".