218406063 has 4 divisors (see below), whose sum is σ = 291208088. Its totient is φ = 145604040.

The previous prime is 218406049. The next prime is 218406101. The reversal of 218406063 is 360604812.

218406063 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 218406063 - 2⁵ = 218406031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218406063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218406043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36401008 + ... + 36401013.

It is an arithmetic number, because the mean of its divisors is an integer number (72802022).

Almost surely, 2^218406063 is an apocalyptic number.

218406063 is a deficient number, since it is larger than the sum of its proper divisors (72802025).

218406063 is an equidigital number, since it uses as much as digits as its factorization.

218406063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72802024.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 218406063 is about 14778.5676910856. The cubic root of 218406063 is about 602.2196148358.

The spelling of 218406063 in words is "two hundred eighteen million, four hundred six thousand, sixty-three".