218193941 has 8 divisors (see below), whose sum is σ = 257963520. Its totient is φ = 180574128.

The previous prime is 218193931. The next prime is 218193991. The reversal of 218193941 is 149391812.

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

It is not a de Polignac number, because 218193941 - 2¹⁸ = 217931797 is a prime.

It is a super-2 number, since 2×218193941² = 95217191778222962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 218193895 and 218193904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218193931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537221 + ... + 537626.

It is an arithmetic number, because the mean of its divisors is an integer number (32245440).

Almost surely, 2^218193941 is an apocalyptic number.

It is an amenable number.

218193941 is a deficient number, since it is larger than the sum of its proper divisors (39769579).

218193941 is a wasteful number, since it uses less digits than its factorization.

218193941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074883.

The product of its digits is 15552, while the sum is 38.

The square root of 218193941 is about 14771.3892711552. The cubic root of 218193941 is about 602.0245875765.

The spelling of 218193941 in words is "two hundred eighteen million, one hundred ninety-three thousand, nine hundred forty-one".