815313203 has 8 divisors (see below), whose sum is σ = 823431168. Its totient is φ = 807222024.

The previous prime is 815313197. The next prime is 815313211. The reversal of 815313203 is 302313518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815313203 is a prime.

It is a super-2 number, since 2×815313203² = 1329471237972238418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (815313283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57500 + ... + 70262.

It is an arithmetic number, because the mean of its divisors is an integer number (102928896).

Almost surely, 2^815313203 is an apocalyptic number.

815313203 is a deficient number, since it is larger than the sum of its proper divisors (8117965).

815313203 is a wasteful number, since it uses less digits than its factorization.

815313203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13393.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 815313203 is about 28553.6898316137. The cubic root of 815313203 is about 934.2035036729.

The spelling of 815313203 in words is "eight hundred fifteen million, three hundred thirteen thousand, two hundred three".