545218 has 16 divisors (see below), whose sum is σ = 859320. Its totient is φ = 259200.

The previous prime is 545213. The next prime is 545231. The reversal of 545218 is 812545.

It can be written as a sum of positive squares in 4 ways, for example, as 223729 + 321489 = 473^2 + 567^2 .

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 545192 and 545201.

It is not an unprimeable number, because it can be changed into a prime (545213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4948 + ... + 5056.

2⁵⁴⁵²¹⁸ is an apocalyptic number.

545218 is a deficient number, since it is larger than the sum of its proper divisors (314102).

545218 is a wasteful number, since it uses less digits than its factorization.

545218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213.

The product of its digits is 1600, while the sum is 25.

The square root of 545218 is about 738.3887864804. The cubic root of 545218 is about 81.6939813301.

The spelling of 545218 in words is "five hundred forty-five thousand, two hundred eighteen".