216443241 has 36 divisors (see below), whose sum is σ = 365914692. Its totient is φ = 122923584.

The previous prime is 216443219. The next prime is 216443261. The reversal of 216443241 is 142344612.

It is a happy number.

216443241 is a `hidden beast` number, since 216 + 443 + 2 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 95355225 + 121088016 = 9765^2 + 11004^2 .

It is not a de Polignac number, because 216443241 - 2¹³ = 216435049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216443261) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 74875 + ... + 77711.

It is an arithmetic number, because the mean of its divisors is an integer number (10164297).

Almost surely, 2^216443241 is an apocalyptic number.

216443241 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

216443241 is a deficient number, since it is larger than the sum of its proper divisors (149471451).

216443241 is a wasteful number, since it uses less digits than its factorization.

216443241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030 (or 3020 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 216443241 is about 14712.0100937975. The cubic root of 216443241 is about 600.4101279279.

Adding to 216443241 its reverse (142344612), we get a palindrome (358787853).

The spelling of 216443241 in words is "two hundred sixteen million, four hundred forty-three thousand, two hundred forty-one".