312115531277 has 4 divisors (see below), whose sum is σ = 340489670496. Its totient is φ = 283741392060.

The previous prime is 312115531249. The next prime is 312115531289. The reversal of 312115531277 is 772135511213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312115531277 is a prime.

It is a super-2 number, since 2×312115531277² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312115531277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312115531877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14187069593 + ... + 14187069614.

It is an arithmetic number, because the mean of its divisors is an integer number (85122417624).

Almost surely, 2^312115531277 is an apocalyptic number.

It is an amenable number.

312115531277 is a deficient number, since it is larger than the sum of its proper divisors (28374139219).

312115531277 is a wasteful number, since it uses less digits than its factorization.

312115531277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28374139218.

The product of its digits is 44100, while the sum is 38.

The spelling of 312115531277 in words is "three hundred twelve billion, one hundred fifteen million, five hundred thirty-one thousand, two hundred seventy-seven".