133603238 has 16 divisors (see below), whose sum is σ = 213871104. Its totient is φ = 62375040.

The previous prime is 133603219. The next prime is 133603243. The reversal of 133603238 is 832306331.

It is a super-3 number, since 3×133603238³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133603238.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11153 + ... + 19788.

It is an arithmetic number, because the mean of its divisors is an integer number (13366944).

Almost surely, 2^133603238 is an apocalyptic number.

133603238 is a deficient number, since it is larger than the sum of its proper divisors (80267866).

133603238 is a wasteful number, since it uses less digits than its factorization.

133603238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31087.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 133603238 is about 11558.6866901045. The cubic root of 133603238 is about 511.2174400746.

Adding to 133603238 its reverse (832306331), we get a palindrome (965909569).

The spelling of 133603238 in words is "one hundred thirty-three million, six hundred three thousand, two hundred thirty-eight".