815882195 has 4 divisors (see below), whose sum is σ = 979058640. Its totient is φ = 652705752.

The previous prime is 815882191. The next prime is 815882203. The reversal of 815882195 is 591288518.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 815882195 - 2² = 815882191 is a prime.

It is a super-2 number, since 2×815882195² = 1331327512236036050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (815882191) 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, 81588215 + ... + 81588224.

It is an arithmetic number, because the mean of its divisors is an integer number (244764660).

Almost surely, 2^815882195 is an apocalyptic number.

815882195 is a deficient number, since it is larger than the sum of its proper divisors (163176445).

815882195 is a wasteful number, since it uses less digits than its factorization.

815882195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163176444.

The product of its digits is 230400, while the sum is 47.

The square root of 815882195 is about 28563.6516398026. The cubic root of 815882195 is about 934.4207742514.

The spelling of 815882195 in words is "eight hundred fifteen million, eight hundred eighty-two thousand, one hundred ninety-five".