216223560 has 256 divisors, whose sum is σ = 847065600. Its totient is φ = 48024576.

The previous prime is 216223537. The next prime is 216223571. The reversal of 216223560 is 65322612.

216223560 is a `hidden beast` number, since 2 + 1 + 622 + 35 + 6 + 0 = 666.

216223560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 279334 + ... + 280106.

It is an arithmetic number, because the mean of its divisors is an integer number (3308850).

Almost surely, 2^216223560 is an apocalyptic number.

216223560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216223560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423532800).

216223560 is an abundant number, since it is smaller than the sum of its proper divisors (630842040).

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

216223560 is a wasteful number, since it uses less digits than its factorization.

216223560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 216223560 is about 14704.5421554022. The cubic root of 216223560 is about 600.2069286260.

The spelling of 216223560 in words is "two hundred sixteen million, two hundred twenty-three thousand, five hundred sixty".