216434306 has 8 divisors (see below), whose sum is σ = 354165264. Its totient is φ = 98379220.

The previous prime is 216434297. The next prime is 216434333. The reversal of 216434306 is 603434612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4918940 + ... + 4918983.

It is an arithmetic number, because the mean of its divisors is an integer number (44270658).

Almost surely, 2^216434306 is an apocalyptic number.

216434306 is a deficient number, since it is larger than the sum of its proper divisors (137730958).

216434306 is a wasteful number, since it uses less digits than its factorization.

216434306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9837936.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 216434306 is about 14711.7064271960. The cubic root of 216434306 is about 600.4018659647.

Adding to 216434306 its reverse (603434612), we get a palindrome (819868918).

The spelling of 216434306 in words is "two hundred sixteen million, four hundred thirty-four thousand, three hundred six".