135181138 has 8 divisors (see below), whose sum is σ = 203186160. Its totient is φ = 67452420.

The previous prime is 135181133. The next prime is 135181139. The reversal of 135181138 is 831181531.

135181138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (135181133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67848 + ... + 69811.

It is an arithmetic number, because the mean of its divisors is an integer number (25398270).

Almost surely, 2^135181138 is an apocalyptic number.

135181138 is a deficient number, since it is larger than the sum of its proper divisors (68005022).

135181138 is a wasteful number, since it uses less digits than its factorization.

135181138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138152.

The product of its digits is 2880, while the sum is 31.

The square root of 135181138 is about 11626.7423640502. The cubic root of 135181138 is about 513.2221197015. Note that the first 3 decimals are identical.

The spelling of 135181138 in words is "one hundred thirty-five million, one hundred eighty-one thousand, one hundred thirty-eight".