218199361 has 8 divisors (see below), whose sum is σ = 221538240. Its totient is φ = 214885008.

The previous prime is 218199347. The next prime is 218199383. The reversal of 218199361 is 163991812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218199361 is a prime.

It is a super-2 number, since 2×218199361² = 95221922281616642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218199341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12210 + ... + 24196.

It is an arithmetic number, because the mean of its divisors is an integer number (27692280).

Almost surely, 2^218199361 is an apocalyptic number.

It is an amenable number.

218199361 is a deficient number, since it is larger than the sum of its proper divisors (3338879).

218199361 is a wasteful number, since it uses less digits than its factorization.

218199361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12263.

The product of its digits is 23328, while the sum is 40.

The square root of 218199361 is about 14771.5727327864. The cubic root of 218199361 is about 602.0295723563.

The spelling of 218199361 in words is "two hundred eighteen million, one hundred ninety-nine thousand, three hundred sixty-one".