218226386 has 32 divisors (see below), whose sum is σ = 380190720. Its totient is φ = 92017296.

The previous prime is 218226377. The next prime is 218226413. The reversal of 218226386 is 683622812.

218226386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246701 + ... + 247583.

It is an arithmetic number, because the mean of its divisors is an integer number (11880960).

Almost surely, 2^218226386 is an apocalyptic number.

218226386 is a deficient number, since it is larger than the sum of its proper divisors (161964334).

218226386 is a wasteful number, since it uses less digits than its factorization.

218226386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158.

The product of its digits is 55296, while the sum is 38.

The square root of 218226386 is about 14772.4874682634. The cubic root of 218226386 is about 602.0544260458.

The spelling of 218226386 in words is "two hundred eighteen million, two hundred twenty-six thousand, three hundred eighty-six".