312988855 has 4 divisors (see below), whose sum is σ = 375586632. Its totient is φ = 250391080.

The previous prime is 312988849. The next prime is 312988859. The reversal of 312988855 is 558889213.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 312988855 - 2²¹ = 310891703 is a prime.

It is a super-2 number, since 2×312988855² = 195924046708422050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312988799 and 312988808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312988859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31298881 + ... + 31298890.

It is an arithmetic number, because the mean of its divisors is an integer number (93896658).

Almost surely, 2^312988855 is an apocalyptic number.

312988855 is a deficient number, since it is larger than the sum of its proper divisors (62597777).

312988855 is an equidigital number, since it uses as much as digits as its factorization.

312988855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62597776.

The product of its digits is 691200, while the sum is 49.

The square root of 312988855 is about 17691.4910338275. The cubic root of 312988855 is about 678.9580748926.

The spelling of 312988855 in words is "three hundred twelve million, nine hundred eighty-eight thousand, eight hundred fifty-five".