133520212 has 24 divisors (see below), whose sum is σ = 270702656. Its totient is φ = 56438208.

The previous prime is 133520207. The next prime is 133520237. The reversal of 133520212 is 212025331.

It is a self number, because there is not a number n which added to its sum of digits gives 133520212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30618 + ... + 34705.

Almost surely, 2^133520212 is an apocalyptic number.

It is an amenable number.

133520212 is an abundant number, since it is smaller than the sum of its proper divisors (137182444).

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

133520212 is a wasteful number, since it uses less digits than its factorization.

133520212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65407 (or 65405 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 133520212 is about 11555.0946339699. The cubic root of 133520212 is about 511.1115216478. Note that the first 3 decimals are identical.

Adding to 133520212 its reverse (212025331), we get a palindrome (345545543).

It can be divided in two parts, 133 and 520212, that multiplied together give a palindrome (69188196).

The spelling of 133520212 in words is "one hundred thirty-three million, five hundred twenty thousand, two hundred twelve".