218122601 has 12 divisors (see below), whose sum is σ = 226808400. Its totient is φ = 209759088.

The previous prime is 218122591. The next prime is 218122607. The reversal of 218122601 is 106221812.

It is a de Polignac number, because none of the positive numbers 2^k-218122601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (218122607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 352070 + ... + 352688.

It is an arithmetic number, because the mean of its divisors is an integer number (18900700).

Almost surely, 2^218122601 is an apocalyptic number.

It is an amenable number.

218122601 is a deficient number, since it is larger than the sum of its proper divisors (8685799).

218122601 is an equidigital number, since it uses as much as digits as its factorization.

218122601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 218122601 is about 14768.9742704089. The cubic root of 218122601 is about 601.9589684068.

The spelling of 218122601 in words is "two hundred eighteen million, one hundred twenty-two thousand, six hundred one".