133303533 has 32 divisors (see below), whose sum is σ = 199065600. Its totient is φ = 78661440.

The previous prime is 133303529. The next prime is 133303549. The reversal of 133303533 is 335303331.

It is not a de Polignac number, because 133303533 - 2² = 133303529 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133303523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347860 + ... + 348242.

It is an arithmetic number, because the mean of its divisors is an integer number (6220800).

Almost surely, 2^133303533 is an apocalyptic number.

It is an amenable number.

133303533 is a deficient number, since it is larger than the sum of its proper divisors (65762067).

133303533 is a wasteful number, since it uses less digits than its factorization.

133303533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 3645, while the sum is 24.

The square root of 133303533 is about 11545.7149193976. The cubic root of 133303533 is about 510.8348916323.

Adding to 133303533 its reverse (335303331), we get a palindrome (468606864).

The spelling of 133303533 in words is "one hundred thirty-three million, three hundred three thousand, five hundred thirty-three".