31275520193 has 2 divisors, whose sum is σ = 31275520194. Its totient is φ = 31275520192.

The previous prime is 31275520187. The next prime is 31275520223. The reversal of 31275520193 is 39102557213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28558296064 + 2717224129 = 168992^2 + 52127^2 .

It is a cyclic number.

It is not a de Polignac number, because 31275520193 - 2²² = 31271325889 is a prime.

It is not a weakly prime, because it can be changed into another prime (31275520183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15637760096 + 15637760097.

It is an arithmetic number, because the mean of its divisors is an integer number (15637760097).

Almost surely, 2^31275520193 is an apocalyptic number.

It is an amenable number.

31275520193 is a deficient number, since it is larger than the sum of its proper divisors (1).

31275520193 is an equidigital number, since it uses as much as digits as its factorization.

31275520193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 38.

The spelling of 31275520193 in words is "thirty-one billion, two hundred seventy-five million, five hundred twenty thousand, one hundred ninety-three".