31520066593 has 2 divisors, whose sum is σ = 31520066594. Its totient is φ = 31520066592.

The previous prime is 31520066477. The next prime is 31520066653. The reversal of 31520066593 is 39566002513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21863466769 + 9656599824 = 147863^2 + 98268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31520066593 is a prime.

It is not a weakly prime, because it can be changed into another prime (31520066293) 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, 15760033296 + 15760033297.

It is an arithmetic number, because the mean of its divisors is an integer number (15760033297).

Almost surely, 2^31520066593 is an apocalyptic number.

It is an amenable number.

31520066593 is a deficient number, since it is larger than the sum of its proper divisors (1).

31520066593 is an equidigital number, since it uses as much as digits as its factorization.

31520066593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 40.

The spelling of 31520066593 in words is "thirty-one billion, five hundred twenty million, sixty-six thousand, five hundred ninety-three".