133033181 has 2 divisors, whose sum is σ = 133033182. Its totient is φ = 133033180.

The previous prime is 133033097. The next prime is 133033189. The reversal of 133033181 is 181330331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133033156 + 25 = 11534^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133033181 is a prime.

It is a super-2 number, since 2×133033181² = 35395654493957522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133033189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66516590 + 66516591.

It is an arithmetic number, because the mean of its divisors is an integer number (66516591).

Almost surely, 2^133033181 is an apocalyptic number.

It is an amenable number.

133033181 is a deficient number, since it is larger than the sum of its proper divisors (1).

133033181 is an equidigital number, since it uses as much as digits as its factorization.

133033181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 133033181 is about 11534.0010837523. The cubic root of 133033181 is about 510.4893176371.

The spelling of 133033181 in words is "one hundred thirty-three million, thirty-three thousand, one hundred eighty-one".