218229361 has 8 divisors (see below), whose sum is σ = 250525184. Its totient is φ = 186213600.

The previous prime is 218229353. The next prime is 218229371. The reversal of 218229361 is 163922812.

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

It is a cyclic number.

It is not a de Polignac number, because 218229361 - 2³ = 218229353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218229371) 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 7 ways as a sum of consecutive naturals, for example, 68340 + ... + 71461.

It is an arithmetic number, because the mean of its divisors is an integer number (31315648).

Almost surely, 2^218229361 is an apocalyptic number.

It is an amenable number.

218229361 is a deficient number, since it is larger than the sum of its proper divisors (32295823).

218229361 is a wasteful number, since it uses less digits than its factorization.

218229361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140031.

The product of its digits is 10368, while the sum is 34.

The square root of 218229361 is about 14772.5881618625. The cubic root of 218229361 is about 602.0571618955.

The spelling of 218229361 in words is "two hundred eighteen million, two hundred twenty-nine thousand, three hundred sixty-one".