31504666313 has 2 divisors, whose sum is σ = 31504666314. Its totient is φ = 31504666312.

The previous prime is 31504666307. The next prime is 31504666343. The reversal of 31504666313 is 31366640513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26880258304 + 4624408009 = 163952^2 + 68003^2 .

It is a cyclic number.

It is not a de Polignac number, because 31504666313 - 2¹⁰ = 31504665289 is a prime.

It is not a weakly prime, because it can be changed into another prime (31504666343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15752333156 + 15752333157.

It is an arithmetic number, because the mean of its divisors is an integer number (15752333157).

Almost surely, 2^31504666313 is an apocalyptic number.

It is an amenable number.

31504666313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31504666313 is an equidigital number, since it uses as much as digits as its factorization.

31504666313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 31504666313 in words is "thirty-one billion, five hundred four million, six hundred sixty-six thousand, three hundred thirteen".