313661120281 has 2 divisors, whose sum is σ = 313661120282. Its totient is φ = 313661120280.

The previous prime is 313661120237. The next prime is 313661120287. The reversal of 313661120281 is 182021166313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312878016025 + 783104256 = 559355^2 + 27984^2 .

It is a cyclic number.

It is not a de Polignac number, because 313661120281 - 2¹⁵ = 313661087513 is a prime.

It is a super-2 number, since 2×313661120281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (313661120287) 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, 156830560140 + 156830560141.

It is an arithmetic number, because the mean of its divisors is an integer number (156830560141).

Almost surely, 2^313661120281 is an apocalyptic number.

It is an amenable number.

313661120281 is a deficient number, since it is larger than the sum of its proper divisors (1).

313661120281 is an equidigital number, since it uses as much as digits as its factorization.

313661120281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

Adding to 313661120281 its reverse (182021166313), we get a palindrome (495682286594).

The spelling of 313661120281 in words is "three hundred thirteen billion, six hundred sixty-one million, one hundred twenty thousand, two hundred eighty-one".