312812818 has 8 divisors (see below), whose sum is σ = 496820412. Its totient is φ = 147206016.

The previous prime is 312812813. The next prime is 312812873. The reversal of 312812818 is 818218213.

It can be written as a sum of positive squares in 2 ways, for example, as 272019049 + 40793769 = 16493^2 + 6387^2 .

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

It is a super-2 number, since 2×312812818² = 195703718210202248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 9200377 = 312812818 / (3 + 1 + 2 + 8 + 1 + 2 + 8 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (312812813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4600155 + ... + 4600222.

Almost surely, 2^312812818 is an apocalyptic number.

312812818 is a deficient number, since it is larger than the sum of its proper divisors (184007594).

312812818 is a wasteful number, since it uses less digits than its factorization.

312812818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9200396.

The product of its digits is 6144, while the sum is 34.

The square root of 312812818 is about 17686.5151457261. The cubic root of 312812818 is about 678.8307602874.

The spelling of 312812818 in words is "three hundred twelve million, eight hundred twelve thousand, eight hundred eighteen".