133161331 has 2 divisors, whose sum is σ = 133161332. Its totient is φ = 133161330.

The previous prime is 133161319. The next prime is 133161341.

133161331 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 133161331 - 2¹⁷ = 133030259 is a prime.

It is a super-2 number, since 2×133161331² = 35463880147383122, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (133161341) 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, 66580665 + 66580666.

It is an arithmetic number, because the mean of its divisors is an integer number (66580666).

Almost surely, 2^133161331 is an apocalyptic number.

133161331 is a deficient number, since it is larger than the sum of its proper divisors (1).

133161331 is an equidigital number, since it uses as much as digits as its factorization.

133161331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 22.

The square root of 133161331 is about 11539.5550607465. Note that the first 3 decimals coincide. The cubic root of 133161331 is about 510.6531820476.

The spelling of 133161331 in words is "one hundred thirty-three million, one hundred sixty-one thousand, three hundred thirty-one".