247218 has 8 divisors (see below), whose sum is σ = 494448. Its totient is φ = 82404.

The previous prime is 247201. The next prime is 247223. The reversal of 247218 is 812742.

It is a sphenic number, since it is the product of 3 distinct primes.

247218 is an admirable number.

It is a super-2 number, since 2×247218² = 122233479048, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 247218.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20596 + ... + 20607.

It is an arithmetic number, because the mean of its divisors is an integer number (61806).

2²⁴⁷²¹⁸ is an apocalyptic number.

247218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

247218 is a wasteful number, since it uses less digits than its factorization.

247218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41208.

The product of its digits is 896, while the sum is 24.

The square root of 247218 is about 497.2102171114. The cubic root of 247218 is about 62.7615069663.

It can be divided in two parts, 247 and 218, that added together give a triangular number (465 = T₃₀).

The spelling of 247218 in words is "two hundred forty-seven thousand, two hundred eighteen".