216339146 has 4 divisors (see below), whose sum is σ = 324508722. Its totient is φ = 108169572.

The previous prime is 216339143. The next prime is 216339199. The reversal of 216339146 is 641933612.

It is a happy number.

216339146 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 173580625 + 42758521 = 13175^2 + 6539^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216339143) 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 as a sum of consecutive naturals, namely, 54084785 + ... + 54084788.

Almost surely, 2^216339146 is an apocalyptic number.

216339146 is a deficient number, since it is larger than the sum of its proper divisors (108169576).

216339146 is a wasteful number, since it uses less digits than its factorization.

216339146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108169575.

The product of its digits is 23328, while the sum is 35.

The square root of 216339146 is about 14708.4719124728. The cubic root of 216339146 is about 600.3138598654.

The spelling of 216339146 in words is "two hundred sixteen million, three hundred thirty-nine thousand, one hundred forty-six".