311402071 has 2 divisors, whose sum is σ = 311402072. Its totient is φ = 311402070.

The previous prime is 311402053. The next prime is 311402111. The reversal of 311402071 is 170204113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311402071 - 2¹⁹ = 310877783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311402041) 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, 155701035 + 155701036.

It is an arithmetic number, because the mean of its divisors is an integer number (155701036).

Almost surely, 2^311402071 is an apocalyptic number.

311402071 is a deficient number, since it is larger than the sum of its proper divisors (1).

311402071 is an equidigital number, since it uses as much as digits as its factorization.

311402071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 311402071 is about 17646.5880838195. The cubic root of 311402071 is about 677.8087415149.

Adding to 311402071 its reverse (170204113), we get a palindrome (481606184).

The spelling of 311402071 in words is "three hundred eleven million, four hundred two thousand, seventy-one".