133403213 has 8 divisors (see below), whose sum is σ = 135724032. Its totient is φ = 131102496.

The previous prime is 133403201. The next prime is 133403251. The reversal of 133403213 is 312304331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133403213 - 2⁸ = 133402957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133403293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8681 + ... + 18497.

It is an arithmetic number, because the mean of its divisors is an integer number (16965504).

Almost surely, 2^133403213 is an apocalyptic number.

It is an amenable number.

133403213 is a deficient number, since it is larger than the sum of its proper divisors (2320819).

133403213 is a wasteful number, since it uses less digits than its factorization.

133403213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 133403213 is about 11550.0308657596. The cubic root of 133403213 is about 510.9621884213.

Adding to 133403213 its reverse (312304331), we get a palindrome (445707544).

The spelling of 133403213 in words is "one hundred thirty-three million, four hundred three thousand, two hundred thirteen".