216512206 has 4 divisors (see below), whose sum is σ = 324768312. Its totient is φ = 108256102.

The previous prime is 216512203. The next prime is 216512207. The reversal of 216512206 is 602215612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216512203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54128050 + ... + 54128053.

It is an arithmetic number, because the mean of its divisors is an integer number (81192078).

Almost surely, 2^216512206 is an apocalyptic number.

216512206 is a deficient number, since it is larger than the sum of its proper divisors (108256106).

216512206 is a wasteful number, since it uses less digits than its factorization.

216512206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108256105.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 216512206 is about 14714.3537404808. The cubic root of 216512206 is about 600.4738904294.

Adding to 216512206 its reverse (602215612), we get a palindrome (818727818).

The spelling of 216512206 in words is "two hundred sixteen million, five hundred twelve thousand, two hundred six".