31254534317 has 2 divisors, whose sum is σ = 31254534318. Its totient is φ = 31254534316.

The previous prime is 31254534313. The next prime is 31254534347. The reversal of 31254534317 is 71343545213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23903015236 + 7351519081 = 154606^2 + 85741^2 .

It is an emirp because it is prime and its reverse (71343545213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31254534317 - 2² = 31254534313 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31254534313) 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, 15627267158 + 15627267159.

It is an arithmetic number, because the mean of its divisors is an integer number (15627267159).

Almost surely, 2^31254534317 is an apocalyptic number.

It is an amenable number.

31254534317 is a deficient number, since it is larger than the sum of its proper divisors (1).

31254534317 is an equidigital number, since it uses as much as digits as its factorization.

31254534317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 38.

The spelling of 31254534317 in words is "thirty-one billion, two hundred fifty-four million, five hundred thirty-four thousand, three hundred seventeen".