216243033 has 24 divisors (see below), whose sum is σ = 304990560. Its totient is φ = 136255680.

The previous prime is 216243031. The next prime is 216243037. The reversal of 216243033 is 330342612.

It is not a de Polignac number, because 216243033 - 2¹ = 216243031 is a prime.

It is a super-2 number, since 2×216243033² = 93522098642078178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216242994 and 216243012.

It is not an unprimeable number, because it can be changed into a prime (216243031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140478 + ... + 142008.

It is an arithmetic number, because the mean of its divisors is an integer number (12707940).

Almost surely, 2^216243033 is an apocalyptic number.

216243033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

216243033 is a deficient number, since it is larger than the sum of its proper divisors (88747527).

216243033 is a wasteful number, since it uses less digits than its factorization.

216243033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669 (or 1646 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 216243033 is about 14705.2042828381. The cubic root of 216243033 is about 600.2249462104.

Adding to 216243033 its reverse (330342612), we get a palindrome (546585645).

The spelling of 216243033 in words is "two hundred sixteen million, two hundred forty-three thousand, thirty-three".