2001218 has 4 divisors (see below), whose sum is σ = 3001830. Its totient is φ = 1000608.

The previous prime is 2001211. The next prime is 2001229. The reversal of 2001218 is 8121002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1620529 + 380689 = 1273^2 + 617^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2001211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500303 + ... + 500306.

2^2001218 is an apocalyptic number.

2001218 is a deficient number, since it is larger than the sum of its proper divisors (1000612).

2001218 is a wasteful number, since it uses less digits than its factorization.

2001218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000611.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2001218 is about 1414.6441248597. The cubic root of 2001218 is about 126.0176761965.

The spelling of 2001218 in words is "two million, one thousand, two hundred eighteen".