216220914 has 96 divisors (see below), whose sum is σ = 598066560. Its totient is φ = 57013632.

The previous prime is 216220883. The next prime is 216220919. The reversal of 216220914 is 419022612.

216220914 is a `hidden beast` number, since 21 + 622 + 0 + 9 + 14 = 666.

216220914 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 not an unprimeable number, because it can be changed into a prime (216220919) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41782 + ... + 46670.

It is an arithmetic number, because the mean of its divisors is an integer number (6229860).

Almost surely, 2^216220914 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216220914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299033280).

216220914 is an abundant number, since it is smaller than the sum of its proper divisors (381845646).

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

216220914 is a wasteful number, since it uses less digits than its factorization.

216220914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926 (or 4914 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 216220914 is about 14704.4521829275. The cubic root of 216220914 is about 600.2044803051.

The spelling of 216220914 in words is "two hundred sixteen million, two hundred twenty thousand, nine hundred fourteen".