16232218 has 4 divisors (see below), whose sum is σ = 24348330. Its totient is φ = 8116108.

The previous prime is 16232201. The next prime is 16232219. The reversal of 16232218 is 81223261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81223261 = 7 ⋅11603323.

It can be written as a sum of positive squares in only one way, i.e., 14799409 + 1432809 = 3847^2 + 1197^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16232192 and 16232201.

It is not an unprimeable number, because it can be changed into a prime (16232219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4058053 + ... + 4058056.

Almost surely, 2^16232218 is an apocalyptic number.

16232218 is a deficient number, since it is larger than the sum of its proper divisors (8116112).

16232218 is an equidigital number, since it uses as much as digits as its factorization.

16232218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116111.

The product of its digits is 1152, while the sum is 25.

The square root of 16232218 is about 4028.9226847881. The cubic root of 16232218 is about 253.1974274883.

Adding to 16232218 its reverse (81223261), we get a palindrome (97455479).

The spelling of 16232218 in words is "sixteen million, two hundred thirty-two thousand, two hundred eighteen".