2169717220 has 96 divisors (see below), whose sum is σ = 5115027456. Its totient is φ = 766281600.

The previous prime is 2169717161. The next prime is 2169717227. The reversal of 2169717220 is 227179612.

It is a self number, because there is not a number n which added to its sum of digits gives 2169717220.

It is not an unprimeable number, because it can be changed into a prime (2169717227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1995517 + ... + 1996603.

It is an arithmetic number, because the mean of its divisors is an integer number (53281536).

Almost surely, 2^2169717220 is an apocalyptic number.

2169717220 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 2169717220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2557513728).

2169717220 is an abundant number, since it is smaller than the sum of its proper divisors (2945310236).

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

2169717220 is a wasteful number, since it uses less digits than its factorization.

2169717220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 2169717220 is about 46580.2234859388. The cubic root of 2169717220 is about 1294.5963510926.

It can be divided in two parts, 216 and 9717220, that added together give a triangular number (9717436 = T₄₄₀₈).

The spelling of 2169717220 in words is "two billion, one hundred sixty-nine million, seven hundred seventeen thousand, two hundred twenty".