31373316647 has 2 divisors, whose sum is σ = 31373316648. Its totient is φ = 31373316646.

The previous prime is 31373316599. The next prime is 31373316691. The reversal of 31373316647 is 74661337313.

It is an a-pointer prime, because the next prime (31373316691) can be obtained adding 31373316647 to its sum of digits (44).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31373316647 - 2¹⁶ = 31373251111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31373316598 and 31373316607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31373316047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15686658323 + 15686658324.

It is an arithmetic number, because the mean of its divisors is an integer number (15686658324).

Almost surely, 2^31373316647 is an apocalyptic number.

31373316647 is a deficient number, since it is larger than the sum of its proper divisors (1).

31373316647 is an equidigital number, since it uses as much as digits as its factorization.

31373316647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 44.

The spelling of 31373316647 in words is "thirty-one billion, three hundred seventy-three million, three hundred sixteen thousand, six hundred forty-seven".