216863803 has 16 divisors (see below), whose sum is σ = 245661696. Its totient is φ = 189937440.

The previous prime is 216863797. The next prime is 216863809. The reversal of 216863803 is 308368612.

It is an interprime number because it is at equal distance from previous prime (216863797) and next prime (216863809).

It is a cyclic number.

It is not a de Polignac number, because 216863803 - 2¹⁷ = 216732731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216863809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35118 + ... + 40828.

It is an arithmetic number, because the mean of its divisors is an integer number (15353856).

Almost surely, 2^216863803 is an apocalyptic number.

216863803 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

216863803 is a deficient number, since it is larger than the sum of its proper divisors (28797893).

216863803 is a wasteful number, since it uses less digits than its factorization.

216863803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5874.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 216863803 is about 14726.2963096632. The cubic root of 216863803 is about 600.7987537747.

The spelling of 216863803 in words is "two hundred sixteen million, eight hundred sixty-three thousand, eight hundred three".