31251344315263 has 2 divisors, whose sum is σ = 31251344315264. Its totient is φ = 31251344315262.

The previous prime is 31251344315209. The next prime is 31251344315273. The reversal of 31251344315263 is 36251344315213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31251344315263 - 2³³ = 31242754380671 is a prime.

It is a super-2 number, since 2×31251344315263² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31251344315273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15625672157631 + 15625672157632.

It is an arithmetic number, because the mean of its divisors is an integer number (15625672157632).

Almost surely, 2^{31251344315263} is an apocalyptic number.

31251344315263 is a deficient number, since it is larger than the sum of its proper divisors (1).

31251344315263 is an equidigital number, since it uses as much as digits as its factorization.

31251344315263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 43.

The spelling of 31251344315263 in words is "thirty-one trillion, two hundred fifty-one billion, three hundred forty-four million, three hundred fifteen thousand, two hundred sixty-three".