312220057 has 2 divisors, whose sum is σ = 312220058. Its totient is φ = 312220056.

The previous prime is 312220039. The next prime is 312220063. The reversal of 312220057 is 750022213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311910921 + 309136 = 17661^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 312220057 - 2²⁷ = 178002329 is a prime.

It is not a weakly prime, because it can be changed into another prime (312220357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156110028 + 156110029.

It is an arithmetic number, because the mean of its divisors is an integer number (156110029).

Almost surely, 2^312220057 is an apocalyptic number.

It is an amenable number.

312220057 is a deficient number, since it is larger than the sum of its proper divisors (1).

312220057 is an equidigital number, since it uses as much as digits as its factorization.

312220057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 312220057 is about 17669.7497718559. The cubic root of 312220057 is about 678.4017083543.

The spelling of 312220057 in words is "three hundred twelve million, two hundred twenty thousand, fifty-seven".