133442215 has 8 divisors (see below), whose sum is σ = 160467840. Its totient is φ = 106528992.

The previous prime is 133442209. The next prime is 133442219. The reversal of 133442215 is 512244331.

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 133442215 - 2³ = 133442207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133442215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133442219) 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, 25464 + ... + 30253.

It is an arithmetic number, because the mean of its divisors is an integer number (20058480).

Almost surely, 2^133442215 is an apocalyptic number.

133442215 is a deficient number, since it is larger than the sum of its proper divisors (27025625).

133442215 is an equidigital number, since it uses as much as digits as its factorization.

133442215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56201.

The product of its digits is 2880, while the sum is 25.

The square root of 133442215 is about 11551.7191361286. The cubic root of 133442215 is about 511.0119788400.

Adding to 133442215 its reverse (512244331), we get a palindrome (645686546).

The spelling of 133442215 in words is "one hundred thirty-three million, four hundred forty-two thousand, two hundred fifteen".