133023213 has 6 divisors (see below), whose sum is σ = 192144654. Its totient is φ = 88682136.

The previous prime is 133023211. The next prime is 133023221. The reversal of 133023213 is 312320331.

It can be written as a sum of positive squares in only one way, i.e., 132641289 + 381924 = 11517^2 + 618^2 .

It is not a de Polignac number, because 133023213 - 2¹ = 133023211 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133023211) 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 in 5 ways as a sum of consecutive naturals, for example, 7390170 + ... + 7390187.

It is an arithmetic number, because the mean of its divisors is an integer number (32024109).

Almost surely, 2^133023213 is an apocalyptic number.

It is an amenable number.

133023213 is a deficient number, since it is larger than the sum of its proper divisors (59121441).

133023213 is a wasteful number, since it uses less digits than its factorization.

133023213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14780363 (or 14780360 counting only the distinct ones).

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

The square root of 133023213 is about 11533.5689619476. The cubic root of 133023213 is about 510.4765672226.

Adding to 133023213 its reverse (312320331), we get a palindrome (445343544).

The spelling of 133023213 in words is "one hundred thirty-three million, twenty-three thousand, two hundred thirteen".