31000817047 has 2 divisors, whose sum is σ = 31000817048. Its totient is φ = 31000817046.

The previous prime is 31000817021. The next prime is 31000817051. The reversal of 31000817047 is 74071800013.

It is a strong prime.

It is an emirp because it is prime and its reverse (74071800013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31000817047 - 2²⁷ = 30866599319 is a prime.

It is a super-2 number, since 2×31000817047² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31000811047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500408523 + 15500408524.

It is an arithmetic number, because the mean of its divisors is an integer number (15500408524).

Almost surely, 2^31000817047 is an apocalyptic number.

31000817047 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000817047 is an equidigital number, since it uses as much as digits as its factorization.

31000817047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The spelling of 31000817047 in words is "thirty-one billion, eight hundred seventeen thousand, forty-seven".