133642218 has 8 divisors (see below), whose sum is σ = 267284448. Its totient is φ = 44547404.

The previous prime is 133642211. The next prime is 133642283. The reversal of 133642218 is 812246331.

133642218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

133642218 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (133642211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11136846 + ... + 11136857.

It is an arithmetic number, because the mean of its divisors is an integer number (33410556).

Almost surely, 2^133642218 is an apocalyptic number.

133642218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133642218 is a wasteful number, since it uses less digits than its factorization.

133642218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22273708.

The product of its digits is 6912, while the sum is 30.

The square root of 133642218 is about 11560.3727448556. The cubic root of 133642218 is about 511.2671527374.

Adding to 133642218 its reverse (812246331), we get a palindrome (945888549).

The spelling of 133642218 in words is "one hundred thirty-three million, six hundred forty-two thousand, two hundred eighteen".