133525221 has 8 divisors (see below), whose sum is σ = 178938144. Its totient is φ = 88564560.

The previous prime is 133525213. The next prime is 133525289. The reversal of 133525221 is 122525331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133525221 - 2³ = 133525213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133525191 and 133525200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133525211) 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 in 7 ways as a sum of consecutive naturals, for example, 112375 + ... + 113556.

It is an arithmetic number, because the mean of its divisors is an integer number (22367268).

Almost surely, 2^133525221 is an apocalyptic number.

It is an amenable number.

133525221 is a deficient number, since it is larger than the sum of its proper divisors (45412923).

133525221 is a wasteful number, since it uses less digits than its factorization.

133525221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226131.

The product of its digits is 1800, while the sum is 24.

The square root of 133525221 is about 11555.3113761594. The cubic root of 133525221 is about 511.1179130037.

The spelling of 133525221 in words is "one hundred thirty-three million, five hundred twenty-five thousand, two hundred twenty-one".