16500025 has 6 divisors (see below), whose sum is σ = 20460062. Its totient is φ = 13200000.

The previous prime is 16500017. The next prime is 16500031. The reversal of 16500025 is 52000561.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 881721 + 15618304 = 939^2 + 3952^2 .

It is not a de Polignac number, because 16500025 - 2³ = 16500017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16499975 and 16500011.

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, 329976 + ... + 330025.

Almost surely, 2^16500025 is an apocalyptic number.

It is an amenable number.

16500025 is a deficient number, since it is larger than the sum of its proper divisors (3960037).

16500025 is an equidigital number, since it uses as much as digits as its factorization.

16500025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660011 (or 660006 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 16500025 is about 4062.0222796041. The cubic root of 16500025 is about 254.5822970598.

Adding to 16500025 its reverse (52000561), we get a palindrome (68500586).

It can be divided in two parts, 165000 and 25, that added together give a triangular number (165025 = T₅₇₄).

The spelling of 16500025 in words is "sixteen million, five hundred thousand, twenty-five".