133771018 has 8 divisors (see below), whose sum is σ = 200706948. Its totient is φ = 66868704.

The previous prime is 133771009. The next prime is 133771031. The reversal of 133771018 is 810177331.

It can be written as a sum of positive squares in 2 ways, for example, as 133471809 + 299209 = 11553^2 + 547^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7780 + ... + 18112.

Almost surely, 2^133771018 is an apocalyptic number.

133771018 is a deficient number, since it is larger than the sum of its proper divisors (66935930).

133771018 is a wasteful number, since it uses less digits than its factorization.

133771018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16808.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 133771018 is about 11565.9421579048. The cubic root of 133771018 is about 511.4313475218.

The spelling of 133771018 in words is "one hundred thirty-three million, seven hundred seventy-one thousand, eighteen".