133225221 has 8 divisors (see below), whose sum is σ = 178826400. Its totient is φ = 88220432.

The previous prime is 133225201. The next prime is 133225229. The reversal of 133225221 is 122522331.

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

It is a cyclic number.

It is not a de Polignac number, because 133225221 - 2⁹ = 133224709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133225229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148575 + ... + 149468.

It is an arithmetic number, because the mean of its divisors is an integer number (22353300).

Almost surely, 2^133225221 is an apocalyptic number.

It is an amenable number.

133225221 is a deficient number, since it is larger than the sum of its proper divisors (45601179).

133225221 is a wasteful number, since it uses less digits than its factorization.

133225221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298195.

The product of its digits is 720, while the sum is 21.

The square root of 133225221 is about 11542.3230330813. The cubic root of 133225221 is about 510.7348384241.

Adding to 133225221 its reverse (122522331), we get a palindrome (255747552).

The spelling of 133225221 in words is "one hundred thirty-three million, two hundred twenty-five thousand, two hundred twenty-one".