16718225 has 24 divisors (see below), whose sum is σ = 22186080. Its totient is φ = 12453120.

The previous prime is 16718213. The next prime is 16718231. The reversal of 16718225 is 52281761.

It is not a de Polignac number, because 16718225 - 2¹⁶ = 16652689 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16718191 and 16718200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58934 + ... + 59216.

It is an arithmetic number, because the mean of its divisors is an integer number (924420).

Almost surely, 2^16718225 is an apocalyptic number.

It is an amenable number.

16718225 is a deficient number, since it is larger than the sum of its proper divisors (5467855).

16718225 is a wasteful number, since it uses less digits than its factorization.

16718225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 444 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 16718225 is about 4088.7926090718. The cubic root of 16718225 is about 255.6996039046.

Adding to 16718225 its reverse (52281761), we get a palindrome (68999986).

The spelling of 16718225 in words is "sixteen million, seven hundred eighteen thousand, two hundred twenty-five".