216116620 has 12 divisors (see below), whose sum is σ = 453844944. Its totient is φ = 86446640.

The previous prime is 216116611. The next prime is 216116633. The reversal of 216116620 is 26611612.

216116620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5402896 + ... + 5402935.

It is an arithmetic number, because the mean of its divisors is an integer number (37820412).

Almost surely, 2^216116620 is an apocalyptic number.

216116620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216116620 is an abundant number, since it is smaller than the sum of its proper divisors (237728324).

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

216116620 is a wasteful number, since it uses less digits than its factorization.

216116620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805840 (or 10805838 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 216116620 is about 14700.9054142934. The cubic root of 216116620 is about 600.1079620540.

It can be divided in two parts, 2161 and 16620, that added together give a palindrome (18781).

The spelling of 216116620 in words is "two hundred sixteen million, one hundred sixteen thousand, six hundred twenty".