201001218 has 32 divisors (see below), whose sum is σ = 439160832. Its totient is φ = 60824400.

The previous prime is 201001181. The next prime is 201001219. The reversal of 201001218 is 812100102.

201001218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 201001197 and 201001206.

It is not an unprimeable number, because it can be changed into a prime (201001219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58455 + ... + 61797.

It is an arithmetic number, because the mean of its divisors is an integer number (13723776).

Almost surely, 2^201001218 is an apocalyptic number.

201001218 is an abundant number, since it is smaller than the sum of its proper divisors (238159614).

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

201001218 is a wasteful number, since it uses less digits than its factorization.

201001218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 201001218 is about 14177.4898342408. The cubic root of 201001218 is about 585.7777834731. Note that the first 4 decimals are identical.

The spelling of 201001218 in words is "two hundred one million, one thousand, two hundred eighteen".