312135851 has 2 divisors, whose sum is σ = 312135852. Its totient is φ = 312135850.

The previous prime is 312135847. The next prime is 312135871. The reversal of 312135851 is 158531213.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (158531213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312135851 - 2² = 312135847 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (312135871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156067925 + 156067926.

It is an arithmetic number, because the mean of its divisors is an integer number (156067926).

Almost surely, 2^312135851 is an apocalyptic number.

312135851 is a deficient number, since it is larger than the sum of its proper divisors (1).

312135851 is an equidigital number, since it uses as much as digits as its factorization.

312135851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 312135851 is about 17667.3668383265. The cubic root of 312135851 is about 678.3407143755.

The spelling of 312135851 in words is "three hundred twelve million, one hundred thirty-five thousand, eight hundred fifty-one".