31285115263 has 2 divisors, whose sum is σ = 31285115264. Its totient is φ = 31285115262.

The previous prime is 31285115219. The next prime is 31285115287. The reversal of 31285115263 is 36251158213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31285115263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31285115663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15642557631 + 15642557632.

It is an arithmetic number, because the mean of its divisors is an integer number (15642557632).

Almost surely, 2^31285115263 is an apocalyptic number.

31285115263 is a deficient number, since it is larger than the sum of its proper divisors (1).

31285115263 is an equidigital number, since it uses as much as digits as its factorization.

31285115263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The spelling of 31285115263 in words is "thirty-one billion, two hundred eighty-five million, one hundred fifteen thousand, two hundred sixty-three".