31312143433057 has 2 divisors, whose sum is σ = 31312143433058. Its totient is φ = 31312143433056.

The previous prime is 31312143433027. The next prime is 31312143433097. The reversal of 31312143433057 is 75033434121313.

It is an a-pointer prime, because the next prime (31312143433097) can be obtained adding 31312143433057 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31286302549056 + 25840884001 = 5593416^2 + 160751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312143433057 is a prime.

It is not a weakly prime, because it can be changed into another prime (31312143433027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656071716528 + 15656071716529.

It is an arithmetic number, because the mean of its divisors is an integer number (15656071716529).

Almost surely, 2^{31312143433057} is an apocalyptic number.

It is an amenable number.

31312143433057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312143433057 is an equidigital number, since it uses as much as digits as its factorization.

31312143433057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 31312143433057 in words is "thirty-one trillion, three hundred twelve billion, one hundred forty-three million, four hundred thirty-three thousand, fifty-seven".