216539106 has 32 divisors (see below), whose sum is σ = 495495168. Its totient is φ = 61799760.

The previous prime is 216539101. The next prime is 216539111. The reversal of 216539106 is 601935612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216539101) and next prime (216539111).

It is not an unprimeable number, because it can be changed into a prime (216539101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44871 + ... + 49461.

It is an arithmetic number, because the mean of its divisors is an integer number (15484224).

Almost surely, 2^216539106 is an apocalyptic number.

216539106 is an abundant number, since it is smaller than the sum of its proper divisors (278956062).

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

216539106 is a wasteful number, since it uses less digits than its factorization.

216539106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 216539106 is about 14715.2677855349. The cubic root of 216539106 is about 600.4987575089.

The spelling of 216539106 in words is "two hundred sixteen million, five hundred thirty-nine thousand, one hundred six".