133291171 has 4 divisors (see below), whose sum is σ = 143544352. Its totient is φ = 123037992.

The previous prime is 133291159. The next prime is 133291181. The reversal of 133291171 is 171192331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171192331 = 43 ⋅3981217.

It is a cyclic number.

It is not a de Polignac number, because 133291171 - 2⁷ = 133291043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133291121) 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 3 ways as a sum of consecutive naturals, for example, 5126571 + ... + 5126596.

It is an arithmetic number, because the mean of its divisors is an integer number (35886088).

Almost surely, 2^133291171 is an apocalyptic number.

133291171 is a deficient number, since it is larger than the sum of its proper divisors (10253181).

133291171 is a wasteful number, since it uses less digits than its factorization.

133291171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10253180.

The product of its digits is 1134, while the sum is 28.

The square root of 133291171 is about 11545.1795568540. The cubic root of 133291171 is about 510.8191002625.

The spelling of 133291171 in words is "one hundred thirty-three million, two hundred ninety-one thousand, one hundred seventy-one".