216610120 has 32 divisors (see below), whose sum is σ = 488849400. Its totient is φ = 86381568.

The previous prime is 216610111. The next prime is 216610123. The reversal of 216610120 is 21016612.

It can be written as a sum of positive squares in 4 ways, for example, as 124411716 + 92198404 = 11154^2 + 9602^2 .

It is not an unprimeable number, because it can be changed into a prime (216610123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5446 + ... + 21514.

Almost surely, 2^216610120 is an apocalyptic number.

216610120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216610120 is an abundant number, since it is smaller than the sum of its proper divisors (272239280).

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

216610120 is a wasteful number, since it uses less digits than its factorization.

216610120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16417 (or 16413 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 216610120 is about 14717.6805237782. The cubic root of 216610120 is about 600.5643948569.

Adding to 216610120 its reverse (21016612), we get a palindrome (237626732).

The spelling of 216610120 in words is "two hundred sixteen million, six hundred ten thousand, one hundred twenty".