133503168 has 28 divisors (see below), whose sum is σ = 353227640. Its totient is φ = 44500992.

The previous prime is 133503163. The next prime is 133503169. The reversal of 133503168 is 861305331.

It is not an unprimeable number, because it can be changed into a prime (133503163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347473 + ... + 347856.

Almost surely, 2^133503168 is an apocalyptic number.

It is an amenable number.

133503168 is an abundant number, since it is smaller than the sum of its proper divisors (219724472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133503168 is an equidigital number, since it uses as much as digits as its factorization.

133503168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695344 (or 695334 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 133503168 is about 11554.3571002458. The cubic root of 133503168 is about 511.0897727421.

Adding to 133503168 its reverse (861305331), we get a palindrome (994808499).

The spelling of 133503168 in words is "one hundred thirty-three million, five hundred three thousand, one hundred sixty-eight".