218689941 has 16 divisors (see below), whose sum is σ = 303605568. Its totient is φ = 139900800.

The previous prime is 218689937. The next prime is 218689967. The reversal of 218689941 is 149986812.

It is not a de Polignac number, because 218689941 - 2² = 218689937 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218689901) 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, 7071 + ... + 22076.

It is an arithmetic number, because the mean of its divisors is an integer number (18975348).

Almost surely, 2^218689941 is an apocalyptic number.

It is an amenable number.

218689941 is a deficient number, since it is larger than the sum of its proper divisors (84915627).

218689941 is a wasteful number, since it uses less digits than its factorization.

218689941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29252.

The product of its digits is 248832, while the sum is 48.

The square root of 218689941 is about 14788.1689535926. The cubic root of 218689941 is about 602.4804178596.

The spelling of 218689941 in words is "two hundred eighteen million, six hundred eighty-nine thousand, nine hundred forty-one".