216312274 has 16 divisors (see below), whose sum is σ = 333340128. Its totient is φ = 105219072.

The previous prime is 216312253. The next prime is 216312287. The reversal of 216312274 is 472213612.

216312274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17209 + ... + 26995.

It is an arithmetic number, because the mean of its divisors is an integer number (20833758).

Almost surely, 2^216312274 is an apocalyptic number.

216312274 is a deficient number, since it is larger than the sum of its proper divisors (117027854).

216312274 is a wasteful number, since it uses less digits than its factorization.

216312274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10089.

The product of its digits is 4032, while the sum is 28.

The square root of 216312274 is about 14707.5583969604. The cubic root of 216312274 is about 600.2890033653.

Adding to 216312274 its reverse (472213612), we get a palindrome (688525886).

The spelling of 216312274 in words is "two hundred sixteen million, three hundred twelve thousand, two hundred seventy-four".