133534212 has 144 divisors (see below), whose sum is σ = 386104320. Its totient is φ = 35750400.

The previous prime is 133534157. The next prime is 133534213. The reversal of 133534212 is 212435331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133534213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 699037 + ... + 699227.

It is an arithmetic number, because the mean of its divisors is an integer number (2681280).

Almost surely, 2^133534212 is an apocalyptic number.

133534212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133534212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193052160).

133534212 is an abundant number, since it is smaller than the sum of its proper divisors (252570108).

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

133534212 is a wasteful number, since it uses less digits than its factorization.

133534212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 273 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 133534212 is about 11555.7004114852. The cubic root of 133534212 is about 511.1293848889.

Adding to 133534212 its reverse (212435331), we get a palindrome (345969543).

The spelling of 133534212 in words is "one hundred thirty-three million, five hundred thirty-four thousand, two hundred twelve".