856242315 has 48 divisors (see below), whose sum is σ = 1654192800. Its totient is φ = 407172096.

The previous prime is 856242301. The next prime is 856242403. The reversal of 856242315 is 513242658.

856242315 is a `hidden beast` number, since 8 + 5 + 624 + 23 + 1 + 5 = 666.

It is not a de Polignac number, because 856242315 - 2¹⁰ = 856241291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856242315.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 14920 + ... + 43989.

It is an arithmetic number, because the mean of its divisors is an integer number (34462350).

Almost surely, 2^856242315 is an apocalyptic number.

856242315 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

856242315 is a deficient number, since it is larger than the sum of its proper divisors (797950485).

856242315 is a wasteful number, since it uses less digits than its factorization.

856242315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58956 (or 58953 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 856242315 is about 29261.6184617324. The cubic root of 856242315 is about 949.5814647586.

The spelling of 856242315 in words is "eight hundred fifty-six million, two hundred forty-two thousand, three hundred fifteen".