133203232218 has 64 divisors (see below), whose sum is σ = 312466176000. Its totient is φ = 37069700544.

The previous prime is 133203232207. The next prime is 133203232219. The reversal of 133203232218 is 812232302331.

It is not an unprimeable number, because it can be changed into a prime (133203232219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23523 + ... + 516681.

It is an arithmetic number, because the mean of its divisors is an integer number (4882284000).

Almost surely, 2^133203232218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133203232218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156233088000).

133203232218 is an abundant number, since it is smaller than the sum of its proper divisors (179262943782).

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

133203232218 is a wasteful number, since it uses less digits than its factorization.

133203232218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493339.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 133203232218 its reverse (812232302331), we get a palindrome (945435534549).

The spelling of 133203232218 in words is "one hundred thirty-three billion, two hundred three million, two hundred thirty-two thousand, two hundred eighteen".