312818815625 has 12 divisors (see below), whose sum is σ = 390998497932. Its totient is φ = 250255050000.

The previous prime is 312818815577. The next prime is 312818815627. The reversal of 312818815625 is 526518818213.

It can be written as a sum of positive squares in 6 ways, for example, as 273495529024 + 39323286601 = 522968^2 + 198301^2 .

It is a de Polignac number, because none of the positive numbers 2^k-312818815625 is a prime.

It is a super-2 number, since 2×312818815625² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312818815627) 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 11 ways as a sum of consecutive naturals, for example, 50047886 + ... + 50054135.

It is an arithmetic number, because the mean of its divisors is an integer number (32583208161).

Almost surely, 2^312818815625 is an apocalyptic number.

It is an amenable number.

312818815625 is a deficient number, since it is larger than the sum of its proper divisors (78179682307).

312818815625 is an frugal number, since it uses more digits than its factorization.

312818815625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100102046 (or 100102026 counting only the distinct ones).

The product of its digits is 921600, while the sum is 50.

The spelling of 312818815625 in words is "three hundred twelve billion, eight hundred eighteen million, eight hundred fifteen thousand, six hundred twenty-five".