133181358 has 16 divisors (see below), whose sum is σ = 267070080. Its totient is φ = 44275896.

The previous prime is 133181357. The next prime is 133181381. The reversal of 133181358 is 853181331.

133181358 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133181357) 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 in 7 ways as a sum of consecutive naturals, for example, 27010 + ... + 31557.

It is an arithmetic number, because the mean of its divisors is an integer number (16691880).

Almost surely, 2^133181358 is an apocalyptic number.

133181358 is an abundant number, since it is smaller than the sum of its proper divisors (133888722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133181358 is a wasteful number, since it uses less digits than its factorization.

133181358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58951.

The product of its digits is 8640, while the sum is 33.

The square root of 133181358 is about 11540.4227825500. The cubic root of 133181358 is about 510.6787809171.

The spelling of 133181358 in words is "one hundred thirty-three million, one hundred eighty-one thousand, three hundred fifty-eight".