133533424 has 10 divisors (see below), whose sum is σ = 258721040. Its totient is φ = 66766704.

The previous prime is 133533383. The next prime is 133533427. The reversal of 133533424 is 424335331.

It is a junction number, because it is equal to n+sod(n) for n = 133533392 and 133533401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133533427) by changing a digit.

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 as a sum of consecutive naturals, namely, 4172904 + ... + 4172935.

It is an arithmetic number, because the mean of its divisors is an integer number (25872104).

Almost surely, 2^133533424 is an apocalyptic number.

It is an amenable number.

133533424 is a deficient number, since it is larger than the sum of its proper divisors (125187616).

133533424 is an equidigital number, since it uses as much as digits as its factorization.

133533424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8345847 (or 8345841 counting only the distinct ones).

The product of its digits is 12960, while the sum is 28.

The square root of 133533424 is about 11555.6663157085. Note that the first 3 decimals coincide. The cubic root of 133533424 is about 511.1283794768.

Adding to 133533424 its reverse (424335331), we get a palindrome (557868755).

The spelling of 133533424 in words is "one hundred thirty-three million, five hundred thirty-three thousand, four hundred twenty-four".