216441943 has 4 divisors (see below), whose sum is σ = 229173840. Its totient is φ = 203710048.

The previous prime is 216441941. The next prime is 216441949. The reversal of 216441943 is 349144612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216441943 - 2¹ = 216441941 is a prime.

It is a super-2 number, since 2×216441943² = 93694229379230498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216441899 and 216441908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216441941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6365923 + ... + 6365956.

It is an arithmetic number, because the mean of its divisors is an integer number (57293460).

Almost surely, 2^216441943 is an apocalyptic number.

216441943 is a deficient number, since it is larger than the sum of its proper divisors (12731897).

216441943 is a wasteful number, since it uses less digits than its factorization.

216441943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12731896.

The product of its digits is 20736, while the sum is 34.

The square root of 216441943 is about 14711.9659801129. The cubic root of 216441943 is about 600.4089277150.

The spelling of 216441943 in words is "two hundred sixteen million, four hundred forty-one thousand, nine hundred forty-three".