216308434 has 8 divisors (see below), whose sum is σ = 324547200. Its totient is φ = 108126036.

The previous prime is 216308431. The next prime is 216308453. The reversal of 216308434 is 434803612.

216308434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 216308396 and 216308405.

It is not an unprimeable number, because it can be changed into a prime (216308431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2634 + ... + 20965.

It is an arithmetic number, because the mean of its divisors is an integer number (40568400).

Almost surely, 2^216308434 is an apocalyptic number.

216308434 is a deficient number, since it is larger than the sum of its proper divisors (108238766).

216308434 is a wasteful number, since it uses less digits than its factorization.

216308434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28184.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 216308434 is about 14707.4278512594. The cubic root of 216308434 is about 600.2854512115.

The spelling of 216308434 in words is "two hundred sixteen million, three hundred eight thousand, four hundred thirty-four".