312296139521 has 2 divisors, whose sum is σ = 312296139522. Its totient is φ = 312296139520.

The previous prime is 312296139509. The next prime is 312296139541. The reversal of 312296139521 is 125931692213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278640402496 + 33655737025 = 527864^2 + 183455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312296139521 is a prime.

It is not a weakly prime, because it can be changed into another prime (312296139541) 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 as a sum of consecutive naturals, namely, 156148069760 + 156148069761.

It is an arithmetic number, because the mean of its divisors is an integer number (156148069761).

Almost surely, 2^312296139521 is an apocalyptic number.

It is an amenable number.

312296139521 is a deficient number, since it is larger than the sum of its proper divisors (1).

312296139521 is an equidigital number, since it uses as much as digits as its factorization.

312296139521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 44.

The spelling of 312296139521 in words is "three hundred twelve billion, two hundred ninety-six million, one hundred thirty-nine thousand, five hundred twenty-one".