216647622 has 48 divisors (see below), whose sum is σ = 489216000. Its totient is φ = 71856072.

The previous prime is 216647611. The next prime is 216647689. The reversal of 216647622 is 226746612.

216647622 is a `hidden beast` number, since 2 + 1 + 6 + 647 + 6 + 2 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107379 + ... + 109377.

It is an arithmetic number, because the mean of its divisors is an integer number (10192000).

Almost surely, 2^216647622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216647622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244608000).

216647622 is an abundant number, since it is smaller than the sum of its proper divisors (272568378).

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

216647622 is a wasteful number, since it uses less digits than its factorization.

216647622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239 (or 2227 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 216647622 is about 14718.9545145027. The cubic root of 216647622 is about 600.5990516961.

The spelling of 216647622 in words is "two hundred sixteen million, six hundred forty-seven thousand, six hundred twenty-two".