133224281 has 2 divisors, whose sum is σ = 133224282. Its totient is φ = 133224280.

The previous prime is 133224263. The next prime is 133224283. The reversal of 133224281 is 182422331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125798656 + 7425625 = 11216^2 + 2725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133224281 is a prime.

It is a super-2 number, since 2×133224281² = 35497418095933922, which contains 22 as substring.

Together with 133224283, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133224281.

It is not a weakly prime, because it can be changed into another prime (133224283) 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, 66612140 + 66612141.

It is an arithmetic number, because the mean of its divisors is an integer number (66612141).

Almost surely, 2^133224281 is an apocalyptic number.

It is an amenable number.

133224281 is a deficient number, since it is larger than the sum of its proper divisors (1).

133224281 is an equidigital number, since it uses as much as digits as its factorization.

133224281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 133224281 is about 11542.2823133036. The cubic root of 133224281 is about 510.7336372204.

The spelling of 133224281 in words is "one hundred thirty-three million, two hundred twenty-four thousand, two hundred eighty-one".