312817128245 has 8 divisors (see below), whose sum is σ = 377771513784. Its totient is φ = 248659729344.

The previous prime is 312817128233. The next prime is 312817128263. The reversal of 312817128245 is 542821718213.

It can be written as a sum of positive squares in 4 ways, for example, as 83221864324 + 229595263921 = 288482^2 + 479161^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 312817128245 - 2⁶ = 312817128181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312817128196 and 312817128205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199245794 + ... + 199247363.

It is an arithmetic number, because the mean of its divisors is an integer number (47221439223).

Almost surely, 2^312817128245 is an apocalyptic number.

It is an amenable number.

312817128245 is a deficient number, since it is larger than the sum of its proper divisors (64954385539).

312817128245 is a wasteful number, since it uses less digits than its factorization.

312817128245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398493319.

The product of its digits is 215040, while the sum is 44.

The spelling of 312817128245 in words is "three hundred twelve billion, eight hundred seventeen million, one hundred twenty-eight thousand, two hundred forty-five".