216025 has 6 divisors (see below), whose sum is σ = 267902. Its totient is φ = 172800.

The previous prime is 216023. The next prime is 216037. The reversal of 216025 is 520612.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 729 + 215296 = 27^2 + 464^2 .

It is not a de Polignac number, because 216025 - 2¹ = 216023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4296 + ... + 4345.

216025 is a Friedman number, since it can be written as 60^(2+1)+5^2, using all its digits and the basic arithmetic operations.

2²¹⁶⁰²⁵ is an apocalyptic number.

216025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216025 is a deficient number, since it is larger than the sum of its proper divisors (51877).

216025 is an equidigital number, since it uses as much as digits as its factorization.

216025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651 (or 8646 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 216025 is about 464.7848964844. The cubic root of 216025 is about 60.0023147255.

Adding to 216025 its reverse (520612), we get a palindrome (736637).

The spelling of 216025 in words is "two hundred sixteen thousand, twenty-five".