249218 has 6 divisors (see below), whose sum is σ = 374889. Its totient is φ = 124256.

The previous prime is 249217. The next prime is 249229. The reversal of 249218 is 812942.

249218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 247009 + 2209 = 497^2 + 47^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=353.

It is a super-2 number, since 2×249218² = 124219223048, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249218.

It is not an unprimeable number, because it can be changed into a prime (249211) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 530 + ... + 882.

2²⁴⁹²¹⁸ is an apocalyptic number.

249218 is a deficient number, since it is larger than the sum of its proper divisors (125671).

249218 is an frugal number, since it uses more digits than its factorization.

249218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708 (or 355 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 249218 is about 499.2173875177. The cubic root of 249218 is about 62.9303000050.

Multiplying 249218 by its product of digits (1152), we get a square (287099136 = 16944²).

The spelling of 249218 in words is "two hundred forty-nine thousand, two hundred eighteen".