133340281 has 2 divisors, whose sum is σ = 133340282. Its totient is φ = 133340280.

The previous prime is 133340279. The next prime is 133340287. The reversal of 133340281 is 182043331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91298025 + 42042256 = 9555^2 + 6484^2 .

It is a cyclic number.

It is not a de Polignac number, because 133340281 - 2¹ = 133340279 is a prime.

It is a super-2 number, since 2×133340281² = 35559261074317922, which contains 22 as substring.

Together with 133340279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (133340287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66670140 + 66670141.

It is an arithmetic number, because the mean of its divisors is an integer number (66670141).

Almost surely, 2^133340281 is an apocalyptic number.

It is an amenable number.

133340281 is a deficient number, since it is larger than the sum of its proper divisors (1).

133340281 is an equidigital number, since it uses as much as digits as its factorization.

133340281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 133340281 is about 11547.3062226651. The cubic root of 133340281 is about 510.8818282124.

It can be divided in two parts, 1333 and 40281, that added together give a palindrome (41614).

The spelling of 133340281 in words is "one hundred thirty-three million, three hundred forty thousand, two hundred eighty-one".