216222061 has 8 divisors (see below), whose sum is σ = 236162304. Its totient is φ = 196329120.

The previous prime is 216222059. The next prime is 216222073. The reversal of 216222061 is 160222612.

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

It is a cyclic number.

It is not a de Polignac number, because 216222061 - 2¹ = 216222059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216222001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1896 + ... + 20881.

It is an arithmetic number, because the mean of its divisors is an integer number (29520288).

Almost surely, 2^216222061 is an apocalyptic number.

It is an amenable number.

216222061 is a deficient number, since it is larger than the sum of its proper divisors (19940243).

216222061 is a wasteful number, since it uses less digits than its factorization.

216222061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23651.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 216222061 is about 14704.4911846687. The cubic root of 216222061 is about 600.2055416167.

Adding to 216222061 its reverse (160222612), we get a palindrome (376444673).

The spelling of 216222061 in words is "two hundred sixteen million, two hundred twenty-two thousand, sixty-one".