312152509 has 2 divisors, whose sum is σ = 312152510. Its totient is φ = 312152508.

The previous prime is 312152483. The next prime is 312152537. The reversal of 312152509 is 905251213.

It is an a-pointer prime, because the next prime (312152537) can be obtained adding 312152509 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268632100 + 43520409 = 16390^2 + 6597^2 .

It is a cyclic number.

It is not a de Polignac number, because 312152509 - 2¹⁵ = 312119741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312152579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156076254 + 156076255.

It is an arithmetic number, because the mean of its divisors is an integer number (156076255).

Almost surely, 2^312152509 is an apocalyptic number.

It is an amenable number.

312152509 is a deficient number, since it is larger than the sum of its proper divisors (1).

312152509 is an equidigital number, since it uses as much as digits as its factorization.

312152509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 312152509 is about 17667.8382661830. The cubic root of 312152509 is about 678.3527813420.

The spelling of 312152509 in words is "three hundred twelve million, one hundred fifty-two thousand, five hundred nine".