3216218 has 4 divisors (see below), whose sum is σ = 4824330. Its totient is φ = 1608108.

The previous prime is 3216211. The next prime is 3216221. The reversal of 3216218 is 8126123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8126123 = 31 ⋅262133.

It can be written as a sum of positive squares in only one way, i.e., 3214849 + 1369 = 1793^2 + 37^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3216193 and 3216202.

It is not an unprimeable number, because it can be changed into a prime (3216211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804053 + ... + 804056.

Almost surely, 2^3216218 is an apocalyptic number.

3216218 is a deficient number, since it is larger than the sum of its proper divisors (1608112).

3216218 is a wasteful number, since it uses less digits than its factorization.

3216218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608111.

The product of its digits is 576, while the sum is 23.

The square root of 3216218 is about 1793.3817217759. The cubic root of 3216218 is about 147.6097889871.

The spelling of 3216218 in words is "three million, two hundred sixteen thousand, two hundred eighteen".