133368281 has 8 divisors (see below), whose sum is σ = 144218880. Its totient is φ = 122851648.

The previous prime is 133368271. The next prime is 133368289. The reversal of 133368281 is 182863331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133368281 - 2⁶ = 133368217 is a prime.

It is a super-2 number, since 2×133368281² = 35574196753789922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133368289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82661 + ... + 84258.

It is an arithmetic number, because the mean of its divisors is an integer number (18027360).

Almost surely, 2^133368281 is an apocalyptic number.

It is an amenable number.

133368281 is a deficient number, since it is larger than the sum of its proper divisors (10850599).

133368281 is a wasteful number, since it uses less digits than its factorization.

133368281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166983.

The product of its digits is 20736, while the sum is 35.

The square root of 133368281 is about 11548.5185630019. The cubic root of 133368281 is about 510.9175855743.

The spelling of 133368281 in words is "one hundred thirty-three million, three hundred sixty-eight thousand, two hundred eighty-one".