216106722 has 72 divisors (see below), whose sum is σ = 533847600. Its totient is φ = 62977824.

The previous prime is 216106721. The next prime is 216106727. The reversal of 216106722 is 227601612.

216106722 is a `hidden beast` number, since 21 + 610 + 6 + 7 + 22 = 666.

It is not an unprimeable number, because it can be changed into a prime (216106721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 55929 + ... + 59667.

It is an arithmetic number, because the mean of its divisors is an integer number (7414550).

Almost surely, 2^216106722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216106722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266923800).

216106722 is an abundant number, since it is smaller than the sum of its proper divisors (317740878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216106722 is a wasteful number, since it uses less digits than its factorization.

216106722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3792 (or 3776 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 216106722 is about 14700.5687645070. The cubic root of 216106722 is about 600.0988003966.

The spelling of 216106722 in words is "two hundred sixteen million, one hundred six thousand, seven hundred twenty-two".