31101319993 has 2 divisors, whose sum is σ = 31101319994. Its totient is φ = 31101319992.

The previous prime is 31101319981. The next prime is 31101320009. The reversal of 31101319993 is 39991310113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22364305209 + 8737014784 = 149547^2 + 93472^2 .

It is a cyclic number.

It is not a de Polignac number, because 31101319993 - 2⁹ = 31101319481 is a prime.

It is not a weakly prime, because it can be changed into another prime (31101310993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15550659996 + 15550659997.

It is an arithmetic number, because the mean of its divisors is an integer number (15550659997).

Almost surely, 2^31101319993 is an apocalyptic number.

It is an amenable number.

31101319993 is a deficient number, since it is larger than the sum of its proper divisors (1).

31101319993 is an equidigital number, since it uses as much as digits as its factorization.

31101319993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19683, while the sum is 40.

The spelling of 31101319993 in words is "thirty-one billion, one hundred one million, three hundred nineteen thousand, nine hundred ninety-three".