31316430647 has 2 divisors, whose sum is σ = 31316430648. Its totient is φ = 31316430646.

The previous prime is 31316430617. The next prime is 31316430661. The reversal of 31316430647 is 74603461313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31316430647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31316430647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31316430617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15658215323 + 15658215324.

It is an arithmetic number, because the mean of its divisors is an integer number (15658215324).

Almost surely, 2^31316430647 is an apocalyptic number.

31316430647 is a deficient number, since it is larger than the sum of its proper divisors (1).

31316430647 is an equidigital number, since it uses as much as digits as its factorization.

31316430647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 31316430647 in words is "thirty-one billion, three hundred sixteen million, four hundred thirty thousand, six hundred forty-seven".