312201971 has 2 divisors, whose sum is σ = 312201972. Its totient is φ = 312201970.

The previous prime is 312201949. The next prime is 312201983. The reversal of 312201971 is 179102213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312201971 - 2¹⁰ = 312200947 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312201971.

It is not a weakly prime, because it can be changed into another prime (312231971) 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, 156100985 + 156100986.

It is an arithmetic number, because the mean of its divisors is an integer number (156100986).

Almost surely, 2^312201971 is an apocalyptic number.

312201971 is a deficient number, since it is larger than the sum of its proper divisors (1).

312201971 is an equidigital number, since it uses as much as digits as its factorization.

312201971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 312201971 is about 17669.2379858329. The cubic root of 312201971 is about 678.3886088219.

The spelling of 312201971 in words is "three hundred twelve million, two hundred one thousand, nine hundred seventy-one".