218241492 has 144 divisors (see below), whose sum is σ = 620524800. Its totient is φ = 59474688.

The previous prime is 218241487. The next prime is 218241497. The reversal of 218241492 is 294142812.

218241492 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (218241487) and next prime (218241497).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218241497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1464634 + ... + 1464782.

It is an arithmetic number, because the mean of its divisors is an integer number (4309200).

Almost surely, 2^218241492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218241492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310262400).

218241492 is an abundant number, since it is smaller than the sum of its proper divisors (402283308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218241492 is a wasteful number, since it uses less digits than its factorization.

218241492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 261 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 218241492 is about 14772.9987477154. The cubic root of 218241492 is about 602.0683174676.

The spelling of 218241492 in words is "two hundred eighteen million, two hundred forty-one thousand, four hundred ninety-two".