312225139 has 2 divisors, whose sum is σ = 312225140. Its totient is φ = 312225138.

The previous prime is 312225131. The next prime is 312225163. The reversal of 312225139 is 931522213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312225139 - 2³ = 312225131 is a prime.

It is not a weakly prime, because it can be changed into another prime (312225131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156112569 + 156112570.

It is an arithmetic number, because the mean of its divisors is an integer number (156112570).

Almost surely, 2^312225139 is an apocalyptic number.

312225139 is a deficient number, since it is larger than the sum of its proper divisors (1).

312225139 is an equidigital number, since it uses as much as digits as its factorization.

312225139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 312225139 is about 17669.8935763632. The cubic root of 312225139 is about 678.4053891116.

The spelling of 312225139 in words is "three hundred twelve million, two hundred twenty-five thousand, one hundred thirty-nine".