312500531489 has 2 divisors, whose sum is σ = 312500531490. Its totient is φ = 312500531488.

The previous prime is 312500531461. The next prime is 312500531509. The reversal of 312500531489 is 984135005213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312294321889 + 206209600 = 558833^2 + 14360^2 .

It is a cyclic number.

It is not a de Polignac number, because 312500531489 - 2³⁶ = 243781054753 is a prime.

It is not a weakly prime, because it can be changed into another prime (312500531459) 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, 156250265744 + 156250265745.

It is an arithmetic number, because the mean of its divisors is an integer number (156250265745).

Almost surely, 2^312500531489 is an apocalyptic number.

It is an amenable number.

312500531489 is a deficient number, since it is larger than the sum of its proper divisors (1).

312500531489 is an equidigital number, since it uses as much as digits as its factorization.

312500531489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 312500531489 in words is "three hundred twelve billion, five hundred million, five hundred thirty-one thousand, four hundred eighty-nine".