16217601220 has 24 divisors (see below), whose sum is σ = 34066479384. Its totient is φ = 6485227776.

The previous prime is 16217601199. The next prime is 16217601251. The reversal of 16217601220 is 2210671261.

16217601220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2190988864 + 14026612356 = 46808^2 + 118434^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38737 + ... + 184216.

It is an arithmetic number, because the mean of its divisors is an integer number (1419436641).

Almost surely, 2^16217601220 is an apocalyptic number.

16217601220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16217601220 is an abundant number, since it is smaller than the sum of its proper divisors (17848878164).

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

16217601220 is a wasteful number, since it uses less digits than its factorization.

16217601220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226599 (or 226597 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 16217601220 in words is "sixteen billion, two hundred seventeen million, six hundred one thousand, two hundred twenty".