31323133249 has 2 divisors, whose sum is σ = 31323133250. Its totient is φ = 31323133248.

The previous prime is 31323133229. The next prime is 31323133291. The reversal of 31323133249 is 94233132313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25914560400 + 5408572849 = 160980^2 + 73543^2 .

It is an emirp because it is prime and its reverse (94233132313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31323133249 is a prime.

It is a super-2 number, since 2×31323133249² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31323133229) 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, 15661566624 + 15661566625.

It is an arithmetic number, because the mean of its divisors is an integer number (15661566625).

Almost surely, 2^31323133249 is an apocalyptic number.

It is an amenable number.

31323133249 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323133249 is an equidigital number, since it uses as much as digits as its factorization.

31323133249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 34.

The spelling of 31323133249 in words is "thirty-one billion, three hundred twenty-three million, one hundred thirty-three thousand, two hundred forty-nine".