31250260813 has 2 divisors, whose sum is σ = 31250260814. Its totient is φ = 31250260812.

The previous prime is 31250260807. The next prime is 31250260817. The reversal of 31250260813 is 31806205213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20433844809 + 10816416004 = 142947^2 + 104002^2 .

It is a cyclic number.

It is not a de Polignac number, because 31250260813 - 2¹⁷ = 31250129741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31250260817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15625130406 + 15625130407.

It is an arithmetic number, because the mean of its divisors is an integer number (15625130407).

Almost surely, 2^31250260813 is an apocalyptic number.

It is an amenable number.

31250260813 is a deficient number, since it is larger than the sum of its proper divisors (1).

31250260813 is an equidigital number, since it uses as much as digits as its factorization.

31250260813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 31250260813 in words is "thirty-one billion, two hundred fifty million, two hundred sixty thousand, eight hundred thirteen".