218966601 has 16 divisors (see below), whose sum is σ = 348171264. Its totient is φ = 119683344.

The previous prime is 218966569. The next prime is 218966623. The reversal of 218966601 is 106669812.

It is not a de Polignac number, because 218966601 - 2⁵ = 218966569 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 218966601.

It is not an unprimeable number, because it can be changed into a prime (218966651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226191 + ... + 227156.

It is an arithmetic number, because the mean of its divisors is an integer number (21760704).

Almost surely, 2^218966601 is an apocalyptic number.

218966601 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

218966601 is a deficient number, since it is larger than the sum of its proper divisors (129204663).

218966601 is a wasteful number, since it uses less digits than its factorization.

218966601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453380.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 218966601 is about 14797.5200962864. The cubic root of 218966601 is about 602.7343725260.

The spelling of 218966601 in words is "two hundred eighteen million, nine hundred sixty-six thousand, six hundred one".