201009218 has 8 divisors (see below), whose sum is σ = 302186700. Its totient is φ = 100280320.

The previous prime is 201009217. The next prime is 201009233. The reversal of 201009218 is 812900102.

201009218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 181090849 + 19918369 = 13457^2 + 4463^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201009193 and 201009202.

It is not an unprimeable number, because it can be changed into a prime (201009217) 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, 111023 + ... + 112818.

Almost surely, 2^201009218 is an apocalyptic number.

201009218 is a deficient number, since it is larger than the sum of its proper divisors (101177482).

201009218 is a wasteful number, since it uses less digits than its factorization.

201009218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224292.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 201009218 is about 14177.7719688250. The cubic root of 201009218 is about 585.7855548358.

The spelling of 201009218 in words is "two hundred one million, nine thousand, two hundred eighteen".