312510251491 has 2 divisors, whose sum is σ = 312510251492. Its totient is φ = 312510251490.

The previous prime is 312510251479. The next prime is 312510251527. The reversal of 312510251491 is 194152015213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312510251491 - 2¹⁵ = 312510218723 is a prime.

It is not a weakly prime, because it can be changed into another prime (312510251441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156255125745 + 156255125746.

It is an arithmetic number, because the mean of its divisors is an integer number (156255125746).

Almost surely, 2^312510251491 is an apocalyptic number.

312510251491 is a deficient number, since it is larger than the sum of its proper divisors (1).

312510251491 is an equidigital number, since it uses as much as digits as its factorization.

312510251491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 34.

It can be divided in two parts, 312510 and 251491, that added together give a square (564001 = 751²).

The spelling of 312510251491 in words is "three hundred twelve billion, five hundred ten million, two hundred fifty-one thousand, four hundred ninety-one".