133781118 has 16 divisors (see below), whose sum is σ = 276788880. Its totient is φ = 43055936.

The previous prime is 133781101. The next prime is 133781149. The reversal of 133781118 is 811187331.

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, 384255 + ... + 384602.

It is an arithmetic number, because the mean of its divisors is an integer number (17299305).

Almost surely, 2^133781118 is an apocalyptic number.

133781118 is an abundant number, since it is smaller than the sum of its proper divisors (143007762).

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

133781118 is a wasteful number, since it uses less digits than its factorization.

133781118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768891.

The product of its digits is 4032, while the sum is 33.

The square root of 133781118 is about 11566.3787764365. The cubic root of 133781118 is about 511.4442185873. Note that the first 3 decimals are identical.

The spelling of 133781118 in words is "one hundred thirty-three million, seven hundred eighty-one thousand, one hundred eighteen".