2173722180 has 96 divisors (see below), whose sum is σ = 7258374144. Its totient is φ = 475246464.

The previous prime is 2173722143. The next prime is 2173722217. The reversal of 2173722180 is 812273712.

It is an interprime number because it is at equal distance from previous prime (2173722143) and next prime (2173722217).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 102852 + ... + 122171.

It is an arithmetic number, because the mean of its divisors is an integer number (75608064).

Almost surely, 2^2173722180 is an apocalyptic number.

2173722180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2173722180 is an abundant number, since it is smaller than the sum of its proper divisors (5084651964).

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

2173722180 is a wasteful number, since it uses less digits than its factorization.

2173722180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225065 (or 225063 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 2173722180 is about 46623.1935843095. The cubic root of 2173722180 is about 1295.3924025637.

Adding to 2173722180 its reverse (812273712), we get a palindrome (2985995892).

The spelling of 2173722180 in words is "two billion, one hundred seventy-three million, seven hundred twenty-two thousand, one hundred eighty".