313201205861 has 2 divisors, whose sum is σ = 313201205862. Its totient is φ = 313201205860.

The previous prime is 313201205857. The next prime is 313201205869. The reversal of 313201205861 is 168502102313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200530213636 + 112670992225 = 447806^2 + 335665^2 .

It is a cyclic number.

It is not a de Polignac number, because 313201205861 - 2² = 313201205857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313201205869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156600602930 + 156600602931.

It is an arithmetic number, because the mean of its divisors is an integer number (156600602931).

Almost surely, 2^313201205861 is an apocalyptic number.

It is an amenable number.

313201205861 is a deficient number, since it is larger than the sum of its proper divisors (1).

313201205861 is an equidigital number, since it uses as much as digits as its factorization.

313201205861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 313201205861 in words is "three hundred thirteen billion, two hundred one million, two hundred five thousand, eight hundred sixty-one".