31320331605247 has 2 divisors, whose sum is σ = 31320331605248. Its totient is φ = 31320331605246.

The previous prime is 31320331605217. The next prime is 31320331605287. The reversal of 31320331605247 is 74250613302313.

It is an a-pointer prime, because the next prime (31320331605287) can be obtained adding 31320331605247 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31320331605247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31320331605217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660165802623 + 15660165802624.

It is an arithmetic number, because the mean of its divisors is an integer number (15660165802624).

Almost surely, 2^{31320331605247} is an apocalyptic number.

31320331605247 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320331605247 is an equidigital number, since it uses as much as digits as its factorization.

31320331605247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 31320331605247 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirty-one million, six hundred five thousand, two hundred forty-seven".