133920212 has 6 divisors (see below), whose sum is σ = 234360378. Its totient is φ = 66960104.

The previous prime is 133920211. The next prime is 133920233. The reversal of 133920212 is 212029331.

It can be written as a sum of positive squares in only one way, i.e., 98327056 + 35593156 = 9916^2 + 5966^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133920211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16740023 + ... + 16740030.

It is an arithmetic number, because the mean of its divisors is an integer number (39060063).

Almost surely, 2^133920212 is an apocalyptic number.

It is an amenable number.

133920212 is a deficient number, since it is larger than the sum of its proper divisors (100440166).

133920212 is a wasteful number, since it uses less digits than its factorization.

133920212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33480057 (or 33480055 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 133920212 is about 11572.3900729279. The cubic root of 133920212 is about 511.6214089681.

Adding to 133920212 its reverse (212029331), we get a palindrome (345949543).

The spelling of 133920212 in words is "one hundred thirty-three million, nine hundred twenty thousand, two hundred twelve".