218233442 has 16 divisors (see below), whose sum is σ = 374472960. Its totient is φ = 93439008.

The previous prime is 218233441. The next prime is 218233451. The reversal of 218233442 is 244332812.

It is not an unprimeable number, because it can be changed into a prime (218233441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8903 + ... + 22709.

It is an arithmetic number, because the mean of its divisors is an integer number (23404560).

Almost surely, 2^218233442 is an apocalyptic number.

218233442 is a deficient number, since it is larger than the sum of its proper divisors (156239518).

218233442 is a wasteful number, since it uses less digits than its factorization.

218233442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14945.

The product of its digits is 9216, while the sum is 29.

The square root of 218233442 is about 14772.7262886713. The cubic root of 218233442 is about 602.0609147971.

The spelling of 218233442 in words is "two hundred eighteen million, two hundred thirty-three thousand, four hundred forty-two".