312222999173 has 2 divisors, whose sum is σ = 312222999174. Its totient is φ = 312222999172.

The previous prime is 312222999157. The next prime is 312222999217. The reversal of 312222999173 is 371999222213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308316999169 + 3906000004 = 555263^2 + 62498^2 .

It is a cyclic number.

It is not a de Polignac number, because 312222999173 - 2⁴ = 312222999157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312222998173) 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, 156111499586 + 156111499587.

It is an arithmetic number, because the mean of its divisors is an integer number (156111499587).

Almost surely, 2^312222999173 is an apocalyptic number.

It is an amenable number.

312222999173 is a deficient number, since it is larger than the sum of its proper divisors (1).

312222999173 is an equidigital number, since it uses as much as digits as its factorization.

312222999173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 50.

The spelling of 312222999173 in words is "three hundred twelve billion, two hundred twenty-two million, nine hundred ninety-nine thousand, one hundred seventy-three".