133138135 has 32 divisors (see below), whose sum is σ = 184851072. Its totient is φ = 91176960.

The previous prime is 133138133. The next prime is 133138141. The reversal of 133138135 is 531831331.

It is not a de Polignac number, because 133138135 - 2¹ = 133138133 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 (133138133) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 77607 + ... + 79303.

It is an arithmetic number, because the mean of its divisors is an integer number (5776596).

Almost surely, 2^133138135 is an apocalyptic number.

133138135 is a deficient number, since it is larger than the sum of its proper divisors (51712937).

133138135 is a wasteful number, since it uses less digits than its factorization.

133138135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803.

The product of its digits is 3240, while the sum is 28.

The square root of 133138135 is about 11538.5499522254. The cubic root of 133138135 is about 510.6235292974.

Adding to 133138135 its reverse (531831331), we get a palindrome (664969466).

The spelling of 133138135 in words is "one hundred thirty-three million, one hundred thirty-eight thousand, one hundred thirty-five".