450218 has 4 divisors (see below), whose sum is σ = 675330. Its totient is φ = 225108.

The previous prime is 450217. The next prime is 450223. The reversal of 450218 is 812054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812054 = 2 ⋅406027.

It can be written as a sum of positive squares in only one way, i.e., 444889 + 5329 = 667^2 + 73^2 .

It is an Ulam number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 450218.

It is not an unprimeable number, because it can be changed into a prime (450217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112553 + ... + 112556.

2⁴⁵⁰²¹⁸ is an apocalyptic number.

450218 is a deficient number, since it is larger than the sum of its proper divisors (225112).

450218 is a wasteful number, since it uses less digits than its factorization.

450218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225111.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 450218 is about 670.9828611820. The cubic root of 450218 is about 76.6433157199.

The spelling of 450218 in words is "four hundred fifty thousand, two hundred eighteen".