218244474 has 48 divisors (see below), whose sum is σ = 543042240. Its totient is φ = 62052480.

The previous prime is 218244443. The next prime is 218244491. The reversal of 218244474 is 474442812.

218244474 is a `hidden beast` number, since 2 + 182 + 4 + 4 + 474 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22482 + ... + 30690.

It is an arithmetic number, because the mean of its divisors is an integer number (11313380).

Almost surely, 2^218244474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218244474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271521120).

218244474 is an abundant number, since it is smaller than the sum of its proper divisors (324797766).

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

218244474 is a wasteful number, since it uses less digits than its factorization.

218244474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8435 (or 8432 counting only the distinct ones).

The product of its digits is 57344, while the sum is 36.

The square root of 218244474 is about 14773.0996747467. The cubic root of 218244474 is about 602.0710596280.

It can be divided in two parts, 2182 and 44474, that added together give a 6-th power (46656 = 6⁶).

The spelling of 218244474 in words is "two hundred eighteen million, two hundred forty-four thousand, four hundred seventy-four".