218264242 has 24 divisors (see below), whose sum is σ = 386650368. Its totient is φ = 90518760.

The previous prime is 218264231. The next prime is 218264243. The reversal of 218264242 is 242462812.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (218264243) 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, 5343 + ... + 21565.

It is an arithmetic number, because the mean of its divisors is an integer number (16110432).

Almost surely, 2^218264242 is an apocalyptic number.

218264242 is a deficient number, since it is larger than the sum of its proper divisors (168386126).

218264242 is a wasteful number, since it uses less digits than its factorization.

218264242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16294 (or 16263 counting only the distinct ones).

The product of its digits is 12288, while the sum is 31.

The square root of 218264242 is about 14773.7687135003. The cubic root of 218264242 is about 602.0892370740.

The spelling of 218264242 in words is "two hundred eighteen million, two hundred sixty-four thousand, two hundred forty-two".