133221415 has 8 divisors (see below), whose sum is σ = 165022848. Its totient is φ = 103139040.

The previous prime is 133221409. The next prime is 133221427. The reversal of 133221415 is 514122331.

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 133221415 - 2⁹ = 133220903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429592 + ... + 429901.

It is an arithmetic number, because the mean of its divisors is an integer number (20627856).

Almost surely, 2^133221415 is an apocalyptic number.

133221415 is a deficient number, since it is larger than the sum of its proper divisors (31801433).

133221415 is an equidigital number, since it uses as much as digits as its factorization.

133221415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859529.

The product of its digits is 720, while the sum is 22.

The square root of 133221415 is about 11542.1581604135. The cubic root of 133221415 is about 510.7299747922.

Adding to 133221415 its reverse (514122331), we get a palindrome (647343746).

The spelling of 133221415 in words is "one hundred thirty-three million, two hundred twenty-one thousand, four hundred fifteen".