133212330 has 64 divisors (see below), whose sum is σ = 360288000. Its totient is φ = 35017920.

The previous prime is 133212319. The next prime is 133212397. The reversal of 133212330 is 33212331.

133212330 is a `hidden beast` number, since 1 + 332 + 1 + 2 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15696 + ... + 22644.

It is an arithmetic number, because the mean of its divisors is an integer number (5629500).

Almost surely, 2^133212330 is an apocalyptic number.

133212330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133212330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180144000).

133212330 is an abundant number, since it is smaller than the sum of its proper divisors (227075670).

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

133212330 is a wasteful number, since it uses less digits than its factorization.

133212330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036 (or 7030 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 133212330 is about 11541.7645964558. The cubic root of 133212330 is about 510.7183648287.

Adding to 133212330 its reverse (33212331), we get a palindrome (166424661).

Subtracting from 133212330 its reverse (33212331), we obtain a palindrome (99999999).

It can be divided in two parts, 13321 and 2330, that added together give a palindrome (15651).

The spelling of 133212330 in words is "one hundred thirty-three million, two hundred twelve thousand, three hundred thirty".