218886941 has 12 divisors (see below), whose sum is σ = 270880992. Its totient is φ = 173184336.

The previous prime is 218886907. The next prime is 218886947. The reversal of 218886941 is 149688812.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-218886941 is a prime.

It is a super-2 number, since 2×218886941² = 95822985880674962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218886947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91331 + ... + 93696.

It is an arithmetic number, because the mean of its divisors is an integer number (22573416).

Almost surely, 2^218886941 is an apocalyptic number.

It is an amenable number.

218886941 is a deficient number, since it is larger than the sum of its proper divisors (51994051).

218886941 is a wasteful number, since it uses less digits than its factorization.

218886941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185060 (or 185047 counting only the distinct ones).

The product of its digits is 221184, while the sum is 47.

The square root of 218886941 is about 14794.8281842000. The cubic root of 218886941 is about 602.6612721178.

The spelling of 218886941 in words is "two hundred eighteen million, eight hundred eighty-six thousand, nine hundred forty-one".