133345181 has 2 divisors, whose sum is σ = 133345182. Its totient is φ = 133345180.

The previous prime is 133345141. The next prime is 133345213. The reversal of 133345181 is 181543331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132595225 + 749956 = 11515^2 + 866^2 .

It is an emirp because it is prime and its reverse (181543331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133345181 - 2⁶ = 133345117 is a prime.

It is a super-2 number, since 2×133345181² = 35561874591845522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133345141) 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, 66672590 + 66672591.

It is an arithmetic number, because the mean of its divisors is an integer number (66672591).

Almost surely, 2^133345181 is an apocalyptic number.

It is an amenable number.

133345181 is a deficient number, since it is larger than the sum of its proper divisors (1).

133345181 is an equidigital number, since it uses as much as digits as its factorization.

133345181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 133345181 is about 11547.5183914121. The cubic root of 133345181 is about 510.8880861121. Note that the first 3 decimals are identical.

The spelling of 133345181 in words is "one hundred thirty-three million, three hundred forty-five thousand, one hundred eighty-one".