216863025 has 24 divisors (see below), whose sum is σ = 359973984. Its totient is φ = 115200000.

The previous prime is 216862963. The next prime is 216863047. The reversal of 216863025 is 520368612.

It is not a de Polignac number, because 216863025 - 2⁸ = 216862769 is a prime.

It is a super-3 number, since 3×216863025³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13650 + ... + 24900.

It is an arithmetic number, because the mean of its divisors is an integer number (14998916).

Almost surely, 2^216863025 is an apocalyptic number.

216863025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216863025 is a deficient number, since it is larger than the sum of its proper divisors (143110959).

216863025 is a wasteful number, since it uses less digits than its factorization.

216863025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11521 (or 11516 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 216863025 is about 14726.2698943079. The cubic root of 216863025 is about 600.7980353177.

The spelling of 216863025 in words is "two hundred sixteen million, eight hundred sixty-three thousand, twenty-five".