312211139 has 2 divisors, whose sum is σ = 312211140. Its totient is φ = 312211138.

The previous prime is 312211079. The next prime is 312211147. The reversal of 312211139 is 931112213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312211139 - 2⁸ = 312210883 is a prime.

It is not a weakly prime, because it can be changed into another prime (312211169) 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, 156105569 + 156105570.

It is an arithmetic number, because the mean of its divisors is an integer number (156105570).

Almost surely, 2^312211139 is an apocalyptic number.

312211139 is a deficient number, since it is larger than the sum of its proper divisors (1).

312211139 is an equidigital number, since it uses as much as digits as its factorization.

312211139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 23.

The square root of 312211139 is about 17669.4974178668. The cubic root of 312211139 is about 678.3952491878.

The spelling of 312211139 in words is "three hundred twelve million, two hundred eleven thousand, one hundred thirty-nine".