31864840841 has 2 divisors, whose sum is σ = 31864840842. Its totient is φ = 31864840840.

The previous prime is 31864840829. The next prime is 31864840859. The reversal of 31864840841 is 14804846813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16662937225 + 15201903616 = 129085^2 + 123296^2 .

It is a cyclic number.

It is not a de Polignac number, because 31864840841 - 2¹⁰ = 31864839817 is a prime.

It is not a weakly prime, because it can be changed into another prime (31864840811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15932420420 + 15932420421.

It is an arithmetic number, because the mean of its divisors is an integer number (15932420421).

Almost surely, 2^31864840841 is an apocalyptic number.

It is an amenable number.

31864840841 is a deficient number, since it is larger than the sum of its proper divisors (1).

31864840841 is an equidigital number, since it uses as much as digits as its factorization.

31864840841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 31864840841 in words is "thirty-one billion, eight hundred sixty-four million, eight hundred forty thousand, eight hundred forty-one".