2258218 has 4 divisors (see below), whose sum is σ = 3387330. Its totient is φ = 1129108.

The previous prime is 2258213. The next prime is 2258227. The reversal of 2258218 is 8128522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2024929 + 233289 = 1423^2 + 483^2 .

It is not an unprimeable number, because it can be changed into a prime (2258213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564553 + ... + 564556.

2^2258218 is an apocalyptic number.

2258218 is a deficient number, since it is larger than the sum of its proper divisors (1129112).

2258218 is a wasteful number, since it uses less digits than its factorization.

2258218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129111.

The product of its digits is 2560, while the sum is 28.

The square root of 2258218 is about 1502.7368365752. The cubic root of 2258218 is about 131.1964110782.

The spelling of 2258218 in words is "two million, two hundred fifty-eight thousand, two hundred eighteen".