31633225993 has 2 divisors, whose sum is σ = 31633225994. Its totient is φ = 31633225992.

The previous prime is 31633225979. The next prime is 31633226021. The reversal of 31633225993 is 39952233613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20441278729 + 11191947264 = 142973^2 + 105792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31633225993 is a prime.

It is not a weakly prime, because it can be changed into another prime (31633225093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15816612996 + 15816612997.

It is an arithmetic number, because the mean of its divisors is an integer number (15816612997).

Almost surely, 2^31633225993 is an apocalyptic number.

It is an amenable number.

31633225993 is a deficient number, since it is larger than the sum of its proper divisors (1).

31633225993 is an equidigital number, since it uses as much as digits as its factorization.

31633225993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 46.

The spelling of 31633225993 in words is "thirty-one billion, six hundred thirty-three million, two hundred twenty-five thousand, nine hundred ninety-three".