312855 has 8 divisors (see below), whose sum is σ = 500592. Its totient is φ = 166848.

The previous prime is 312841. The next prime is 312857. The reversal of 312855 is 558213.

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

It is not a de Polignac number, because 312855 - 2⁴ = 312839 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312855.

It is not an unprimeable number, because it can be changed into a prime (312857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10414 + ... + 10443.

It is an arithmetic number, because the mean of its divisors is an integer number (62574).

2³¹²⁸⁵⁵ is an apocalyptic number.

312855 is a deficient number, since it is larger than the sum of its proper divisors (187737).

312855 is a wasteful number, since it uses less digits than its factorization.

312855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20865.

The product of its digits is 1200, while the sum is 24.

The square root of 312855 is about 559.3344259028. The cubic root of 312855 is about 67.8861271774.

Subtracting from 312855 its product of digits (1200), we obtain a triangular number (311655 = T₇₈₉).

The spelling of 312855 in words is "three hundred twelve thousand, eight hundred fifty-five".