16525225 has 6 divisors (see below), whose sum is σ = 20491310. Its totient is φ = 13220160.

The previous prime is 16525183. The next prime is 16525237. The reversal of 16525225 is 52252561.

It can be written as a sum of positive squares in 3 ways, for example, as 1679616 + 14845609 = 1296^2 + 3853^2 .

It is not a de Polignac number, because 16525225 - 2⁷ = 16525097 is a prime.

It is a super-2 number, since 2×16525225² = 546166122601250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16525193 and 16525202.

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, 330480 + ... + 330529.

Almost surely, 2^16525225 is an apocalyptic number.

It is an amenable number.

16525225 is a deficient number, since it is larger than the sum of its proper divisors (3966085).

16525225 is an equidigital number, since it uses as much as digits as its factorization.

16525225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661019 (or 661014 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 16525225 is about 4065.1229993691. The cubic root of 16525225 is about 254.7118364716.

Adding to 16525225 its reverse (52252561), we get a palindrome (68777786).

The spelling of 16525225 in words is "sixteen million, five hundred twenty-five thousand, two hundred twenty-five".