216439052 has 12 divisors (see below), whose sum is σ = 380438520. Its totient is φ = 107742336.

The previous prime is 216439033. The next prime is 216439079. The reversal of 216439052 is 250934612.

It is a happy 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, 118277 + ... + 120092.

It is an arithmetic number, because the mean of its divisors is an integer number (31703210).

Almost surely, 2^216439052 is an apocalyptic number.

It is an amenable number.

216439052 is a deficient number, since it is larger than the sum of its proper divisors (163999468).

216439052 is a wasteful number, since it uses less digits than its factorization.

216439052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238600 (or 238598 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 216439052 is about 14711.8677264309. The cubic root of 216439052 is about 600.4062544964.

The spelling of 216439052 in words is "two hundred sixteen million, four hundred thirty-nine thousand, fifty-two".