815393085 has 16 divisors (see below), whose sum is σ = 1404985344. Its totient is φ = 401424192.

The previous prime is 815393081. The next prime is 815393101. The reversal of 815393085 is 580393518.

It is not a de Polignac number, because 815393085 - 2² = 815393081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815393081) 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, 2090557 + ... + 2090946.

It is an arithmetic number, because the mean of its divisors is an integer number (87811584).

Almost surely, 2^815393085 is an apocalyptic number.

It is an amenable number.

815393085 is a deficient number, since it is larger than the sum of its proper divisors (589592259).

815393085 is a wasteful number, since it uses less digits than its factorization.

815393085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181524.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 815393085 is about 28555.0886008081. The cubic root of 815393085 is about 934.2340128510.

The spelling of 815393085 in words is "eight hundred fifteen million, three hundred ninety-three thousand, eighty-five".