216498025 has 6 divisors (see below), whose sum is σ = 268457582. Its totient is φ = 173198400.

The previous prime is 216498013. The next prime is 216498041. The reversal of 216498025 is 520894612.

It can be written as a sum of positive squares in 3 ways, for example, as 41306329 + 175191696 = 6427^2 + 13236^2 .

It is not a de Polignac number, because 216498025 - 2⁹ = 216497513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4329936 + ... + 4329985.

Almost surely, 2^216498025 is an apocalyptic number.

216498025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216498025 is a deficient number, since it is larger than the sum of its proper divisors (51959557).

216498025 is an equidigital number, since it uses as much as digits as its factorization.

216498025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8659931 (or 8659926 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 216498025 is about 14713.8718561771. The cubic root of 216498025 is about 600.4607803045.

The spelling of 216498025 in words is "two hundred sixteen million, four hundred ninety-eight thousand, twenty-five".