2238218 has 4 divisors (see below), whose sum is σ = 3357330. Its totient is φ = 1119108.

The previous prime is 2238217. The next prime is 2238233. The reversal of 2238218 is 8128322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8128322 = 2 ⋅4064161.

It can be written as a sum of positive squares in only one way, i.e., 1283689 + 954529 = 1133^2 + 977^2 .

It is a d-powerful number, because it can be written as 2⁵ + 2¹⁴ + 3¹⁰ + 8² + 2¹⁶ + 1 + 8⁷ .

It is not an unprimeable number, because it can be changed into a prime (2238211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559553 + ... + 559556.

2^2238218 is an apocalyptic number.

2238218 is a deficient number, since it is larger than the sum of its proper divisors (1119112).

2238218 is a wasteful number, since it uses less digits than its factorization.

2238218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119111.

The product of its digits is 1536, while the sum is 26.

The square root of 2238218 is about 1496.0675118456. The cubic root of 2238218 is about 130.8079465350.

The spelling of 2238218 in words is "two million, two hundred thirty-eight thousand, two hundred eighteen".