2193218 has 4 divisors (see below), whose sum is σ = 3289830. Its totient is φ = 1096608.

The previous prime is 2193209. The next prime is 2193223. The reversal of 2193218 is 8123912.

2193218 = 422² + 423² + ... + 433².

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., 1138489 + 1054729 = 1067^2 + 1027^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548303 + ... + 548306.

2^2193218 is an apocalyptic number.

2193218 is a deficient number, since it is larger than the sum of its proper divisors (1096612).

2193218 is a wasteful number, since it uses less digits than its factorization.

2193218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096611.

The product of its digits is 864, while the sum is 26.

The square root of 2193218 is about 1480.9517210227. The cubic root of 2193218 is about 129.9253614943.

It can be divided in two parts, 21 and 93218, that added together give a palindrome (93239).

The spelling of 2193218 in words is "two million, one hundred ninety-three thousand, two hundred eighteen".