216061188 has 60 divisors (see below), whose sum is σ = 588210000. Its totient is φ = 61723536.

The previous prime is 216061187. The next prime is 216061213. The reversal of 216061188 is 881160612.

It is not an unprimeable number, because it can be changed into a prime (216061187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25063 + ... + 32561.

It is an arithmetic number, because the mean of its divisors is an integer number (9803500).

Almost surely, 2^216061188 is an apocalyptic number.

216061188 is a gapful number since it is divisible by the number (28) 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 216061188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294105000).

216061188 is an abundant number, since it is smaller than the sum of its proper divisors (372148812).

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

216061188 is an equidigital number, since it uses as much as digits as its factorization.

216061188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7534 (or 7511 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 216061188 is about 14699.0199673312. The cubic root of 216061188 is about 600.0566502066.

The spelling of 216061188 in words is "two hundred sixteen million, sixty-one thousand, one hundred eighty-eight".