312256643155 has 16 divisors (see below), whose sum is σ = 383304933504. Its totient is φ = 244091352960.

The previous prime is 312256643131. The next prime is 312256643159. The reversal of 312256643155 is 551346652213.

It is not a de Polignac number, because 312256643155 - 2¹⁵ = 312256610387 is a prime.

It is a super-2 number, since 2×312256643155² (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 (312256643159) 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 15 ways as a sum of consecutive naturals, for example, 939756 + ... + 1227865.

It is an arithmetic number, because the mean of its divisors is an integer number (23956558344).

Almost surely, 2^312256643155 is an apocalyptic number.

312256643155 is a deficient number, since it is larger than the sum of its proper divisors (71048290349).

312256643155 is a wasteful number, since it uses less digits than its factorization.

312256643155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168286.

The product of its digits is 648000, while the sum is 43.

The spelling of 312256643155 in words is "three hundred twelve billion, two hundred fifty-six million, six hundred forty-three thousand, one hundred fifty-five".