216442064 has 20 divisors (see below), whose sum is σ = 419605956. Its totient is φ = 108156672.

The previous prime is 216442033. The next prime is 216442073. The reversal of 216442064 is 460244612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72250000 + 144192064 = 8500^2 + 12008^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 35462 + ... + 41114.

Almost surely, 2^216442064 is an apocalyptic number.

It is an amenable number.

216442064 is a deficient number, since it is larger than the sum of its proper divisors (203163892).

216442064 is a wasteful number, since it uses less digits than its factorization.

216442064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8054 (or 8048 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 216442064 is about 14711.9700924111. The cubic root of 216442064 is about 600.4090395995.

Adding to 216442064 its reverse (460244612), we get a palindrome (676686676).

The spelling of 216442064 in words is "two hundred sixteen million, four hundred forty-two thousand, sixty-four".