31320233057 has 2 divisors, whose sum is σ = 31320233058. Its totient is φ = 31320233056.

The previous prime is 31320233011. The next prime is 31320233081. The reversal of 31320233057 is 75033202313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17778488896 + 13541744161 = 133336^2 + 116369^2 .

It is an emirp because it is prime and its reverse (75033202313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31320233057 is a prime.

It is not a weakly prime, because it can be changed into another prime (31320233657) 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, 15660116528 + 15660116529.

It is an arithmetic number, because the mean of its divisors is an integer number (15660116529).

Almost surely, 2^31320233057 is an apocalyptic number.

It is an amenable number.

31320233057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320233057 is an equidigital number, since it uses as much as digits as its factorization.

31320233057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 29.

The spelling of 31320233057 in words is "thirty-one billion, three hundred twenty million, two hundred thirty-three thousand, fifty-seven".