31255251353993 has 2 divisors, whose sum is σ = 31255251353994. Its totient is φ = 31255251353992.

The previous prime is 31255251353971. The next prime is 31255251354043. The reversal of 31255251353993 is 39935315255213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30644107346944 + 611144007049 = 5535712^2 + 781757^2 .

It is a cyclic number.

It is not a de Polignac number, because 31255251353993 - 2¹² = 31255251349897 is a prime.

It is not a weakly prime, because it can be changed into another prime (31255251353903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15627625676996 + 15627625676997.

It is an arithmetic number, because the mean of its divisors is an integer number (15627625676997).

Almost surely, 2^{31255251353993} is an apocalyptic number.

It is an amenable number.

31255251353993 is a deficient number, since it is larger than the sum of its proper divisors (1).

31255251353993 is an equidigital number, since it uses as much as digits as its factorization.

31255251353993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16402500, while the sum is 56.

The spelling of 31255251353993 in words is "thirty-one trillion, two hundred fifty-five billion, two hundred fifty-one million, three hundred fifty-three thousand, nine hundred ninety-three".