816131315 has 8 divisors (see below), whose sum is σ = 988866528. Its totient is φ = 646565760.

The previous prime is 816131299. The next prime is 816131321. The reversal of 816131315 is 513131618.

816131315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 816131315 - 2⁴ = 816131299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791846 + ... + 792875.

It is an arithmetic number, because the mean of its divisors is an integer number (123608316).

Almost surely, 2^816131315 is an apocalyptic number.

816131315 is a deficient number, since it is larger than the sum of its proper divisors (172735213).

816131315 is a wasteful number, since it uses less digits than its factorization.

816131315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584829.

The product of its digits is 2160, while the sum is 29.

The square root of 816131315 is about 28568.0120939487. The cubic root of 816131315 is about 934.5158693588.

It can be divided in two parts, 81613 and 1315, that added together give a palindrome (82928).

The spelling of 816131315 in words is "eight hundred sixteen million, one hundred thirty-one thousand, three hundred fifteen".