311432047 has 2 divisors, whose sum is σ = 311432048. Its totient is φ = 311432046.

The previous prime is 311431999. The next prime is 311432053. The reversal of 311432047 is 740234113.

It is a strong prime.

It is an emirp because it is prime and its reverse (740234113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311432047 - 2⁷ = 311431919 is a prime.

It is a super-2 number, since 2×311432047² = 193979839797220418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311432447) 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, 155716023 + 155716024.

It is an arithmetic number, because the mean of its divisors is an integer number (155716024).

Almost surely, 2^311432047 is an apocalyptic number.

311432047 is a deficient number, since it is larger than the sum of its proper divisors (1).

311432047 is an equidigital number, since it uses as much as digits as its factorization.

311432047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 311432047 is about 17647.4374060372. The cubic root of 311432047 is about 677.8304897571.

The spelling of 311432047 in words is "three hundred eleven million, four hundred thirty-two thousand, forty-seven".