31323372433 has 2 divisors, whose sum is σ = 31323372434. Its totient is φ = 31323372432.

The previous prime is 31323372391. The next prime is 31323372461. The reversal of 31323372433 is 33427332313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19252395009 + 12070977424 = 138753^2 + 109868^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323372433 - 2³³ = 22733437841 is a prime.

It is not a weakly prime, because it can be changed into another prime (31323372533) 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, 15661686216 + 15661686217.

It is an arithmetic number, because the mean of its divisors is an integer number (15661686217).

Almost surely, 2^31323372433 is an apocalyptic number.

It is an amenable number.

31323372433 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323372433 is an equidigital number, since it uses as much as digits as its factorization.

31323372433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 34.

The spelling of 31323372433 in words is "thirty-one billion, three hundred twenty-three million, three hundred seventy-two thousand, four hundred thirty-three".