216343242 has 12 divisors (see below), whose sum is σ = 468743730. Its totient is φ = 72114408.

The previous prime is 216343223. The next prime is 216343243. The reversal of 216343242 is 242343612.

216343242 is a `hidden beast` number, since 2 + 1 + 634 + 3 + 24 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 214066161 + 2277081 = 14631^2 + 1509^2 .

It is not an unprimeable number, because it can be changed into a prime (216343243) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6009517 + ... + 6009552.

Almost surely, 2^216343242 is an apocalyptic number.

216343242 is an abundant number, since it is smaller than the sum of its proper divisors (252400488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216343242 is a wasteful number, since it uses less digits than its factorization.

216343242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12019077 (or 12019074 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 216343242 is about 14708.6111512950. The cubic root of 216343242 is about 600.3176484694.

Adding to 216343242 its reverse (242343612), we get a palindrome (458686854).

The spelling of 216343242 in words is "two hundred sixteen million, three hundred forty-three thousand, two hundred forty-two".