16118225 has 6 divisors (see below), whose sum is σ = 19986630. Its totient is φ = 12894560.

The previous prime is 16118209. The next prime is 16118243. The reversal of 16118225 is 52281161.

It can be written as a sum of positive squares in 3 ways, for example, as 110224 + 16008001 = 332^2 + 4001^2 .

It is not a de Polignac number, because 16118225 - 2⁴ = 16118209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16118194 and 16118203.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 322340 + ... + 322389.

It is an arithmetic number, because the mean of its divisors is an integer number (3331105).

Almost surely, 2^16118225 is an apocalyptic number.

It is an amenable number.

16118225 is a deficient number, since it is larger than the sum of its proper divisors (3868405).

16118225 is an equidigital number, since it uses as much as digits as its factorization.

16118225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644739 (or 644734 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 16118225 is about 4014.7509262718. The cubic root of 16118225 is about 252.6033299272.

Adding to 16118225 its reverse (52281161), we get a palindrome (68399386).

The spelling of 16118225 in words is "sixteen million, one hundred eighteen thousand, two hundred twenty-five".