133566131 has 2 divisors, whose sum is σ = 133566132. Its totient is φ = 133566130.

The previous prime is 133566091. The next prime is 133566179. The reversal of 133566131 is 131665331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133566131 - 2¹⁴ = 133549747 is a prime.

It is a super-2 number, since 2×133566131² = 35679822700618322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 133566094 and 133566103.

It is not a weakly prime, because it can be changed into another prime (133566931) 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, 66783065 + 66783066.

It is an arithmetic number, because the mean of its divisors is an integer number (66783066).

Almost surely, 2^133566131 is an apocalyptic number.

133566131 is a deficient number, since it is larger than the sum of its proper divisors (1).

133566131 is an equidigital number, since it uses as much as digits as its factorization.

133566131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 29.

The square root of 133566131 is about 11557.0814222277. The cubic root of 133566131 is about 511.1701071349.

The spelling of 133566131 in words is "one hundred thirty-three million, five hundred sixty-six thousand, one hundred thirty-one".