216231722 has 8 divisors (see below), whose sum is σ = 370682976. Its totient is φ = 92670732.

The previous prime is 216231709. The next prime is 216231779. The reversal of 216231722 is 227132612.

216231722 is digitally balanced in base 3, 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 = 216231691 and 216231700.

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, 7722548 + ... + 7722575.

It is an arithmetic number, because the mean of its divisors is an integer number (46335372).

Almost surely, 2^216231722 is an apocalyptic number.

216231722 is a deficient number, since it is larger than the sum of its proper divisors (154451254).

216231722 is a wasteful number, since it uses less digits than its factorization.

216231722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15445132.

The product of its digits is 2016, while the sum is 26.

The square root of 216231722 is about 14704.8196860757. The cubic root of 216231722 is about 600.2144807283.

The spelling of 216231722 in words is "two hundred sixteen million, two hundred thirty-one thousand, seven hundred twenty-two".