218960985 has 8 divisors (see below), whose sum is σ = 350337600. Its totient is φ = 116779184.

The previous prime is 218960981. The next prime is 218960993. The reversal of 218960985 is 589069812.

It is a happy number.

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 218960985 - 2² = 218960981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218960981) 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, 7298685 + ... + 7298714.

It is an arithmetic number, because the mean of its divisors is an integer number (43792200).

Almost surely, 2^218960985 is an apocalyptic number.

It is an amenable number.

218960985 is a deficient number, since it is larger than the sum of its proper divisors (131376615).

218960985 is a wasteful number, since it uses less digits than its factorization.

218960985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14597407.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 218960985 is about 14797.3303335433. The cubic root of 218960985 is about 602.7292195557.

The spelling of 218960985 in words is "two hundred eighteen million, nine hundred sixty thousand, nine hundred eighty-five".