31054532521993 has 2 divisors, whose sum is σ = 31054532521994. Its totient is φ = 31054532521992.

The previous prime is 31054532521981. The next prime is 31054532522051. The reversal of 31054532521993 is 39912523545013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29319972403264 + 1734560118729 = 5414792^2 + 1317027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31054532521993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31054532521993.

It is not a weakly prime, because it can be changed into another prime (31054532525993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15527266260996 + 15527266260997.

It is an arithmetic number, because the mean of its divisors is an integer number (15527266260997).

Almost surely, 2^{31054532521993} is an apocalyptic number.

It is an amenable number.

31054532521993 is a deficient number, since it is larger than the sum of its proper divisors (1).

31054532521993 is an equidigital number, since it uses as much as digits as its factorization.

31054532521993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374000, while the sum is 52.

The spelling of 31054532521993 in words is "thirty-one trillion, fifty-four billion, five hundred thirty-two million, five hundred twenty-one thousand, nine hundred ninety-three".