216533025 has 36 divisors (see below), whose sum is σ = 408255120. Its totient is φ = 109404000.

The previous prime is 216532999. The next prime is 216533033. The reversal of 216533025 is 520335612.

216533025 is a `hidden beast` number, since 2 + 1 + 653 + 3 + 0 + 2 + 5 = 666.

It is not a de Polignac number, because 216533025 - 2¹⁵ = 216500257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216533025.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21051 + ... + 29600.

It is an arithmetic number, because the mean of its divisors is an integer number (11340420).

Almost surely, 2^216533025 is an apocalyptic number.

216533025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216533025 is a deficient number, since it is larger than the sum of its proper divisors (191722095).

216533025 is a wasteful number, since it uses less digits than its factorization.

216533025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50686 (or 50678 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 216533025 is about 14715.0611619524. The cubic root of 216533025 is about 600.4931362500.

Adding to 216533025 its reverse (520335612), we get a palindrome (736868637).

The spelling of 216533025 in words is "two hundred sixteen million, five hundred thirty-three thousand, twenty-five".