133385518 has 16 divisors (see below), whose sum is σ = 234841824. Its totient is φ = 55620000.

The previous prime is 133385509. The next prime is 133385531. The reversal of 133385518 is 815583331.

133385518 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 128233 + ... + 129268.

It is an arithmetic number, because the mean of its divisors is an integer number (14677614).

Almost surely, 2^133385518 is an apocalyptic number.

133385518 is a deficient number, since it is larger than the sum of its proper divisors (101456306).

133385518 is a wasteful number, since it uses less digits than its factorization.

133385518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257547.

The product of its digits is 43200, while the sum is 37.

The square root of 133385518 is about 11549.2648250874. The cubic root of 133385518 is about 510.9395955729.

It can be divided in two parts, 133385 and 518, that added together give a triangular number (133903 = T₅₁₇).

The spelling of 133385518 in words is "one hundred thirty-three million, three hundred eighty-five thousand, five hundred eighteen".