216229480 has 64 divisors (see below), whose sum is σ = 502917840. Its totient is φ = 83607552.

The previous prime is 216229451. The next prime is 216229483. The reversal of 216229480 is 84922612.

216229480 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 125484804 + 90744676 = 11202^2 + 9526^2 .

It is not an unprimeable number, because it can be changed into a prime (216229483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285262 + ... + 286018.

Almost surely, 2^216229480 is an apocalyptic number.

216229480 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 216229480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251458920).

216229480 is an abundant number, since it is smaller than the sum of its proper divisors (286688360).

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

216229480 is a wasteful number, since it uses less digits than its factorization.

216229480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 216229480 is about 14704.7434523694. The cubic root of 216229480 is about 600.2124062786.

The spelling of 216229480 in words is "two hundred sixteen million, two hundred twenty-nine thousand, four hundred eighty".