133171433 has 4 divisors (see below), whose sum is σ = 133253460. Its totient is φ = 133089408.

The previous prime is 133171391. The next prime is 133171447. The reversal of 133171433 is 334171331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 334171331 = 13 ⋅25705487.

It can be written as a sum of positive squares in 2 ways, for example, as 52027369 + 81144064 = 7213^2 + 9008^2 .

It is a cyclic number.

It is not a de Polignac number, because 133171433 - 2⁶ = 133171369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133171453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38528 + ... + 41841.

It is an arithmetic number, because the mean of its divisors is an integer number (33313365).

Almost surely, 2^133171433 is an apocalyptic number.

It is an amenable number.

133171433 is a deficient number, since it is larger than the sum of its proper divisors (82027).

133171433 is an equidigital number, since it uses as much as digits as its factorization.

133171433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82026.

The product of its digits is 2268, while the sum is 26.

The square root of 133171433 is about 11539.9927642958. The cubic root of 133171433 is about 510.6660949254. Note that the first 3 decimals are identical.

The spelling of 133171433 in words is "one hundred thirty-three million, one hundred seventy-one thousand, four hundred thirty-three".