2173455872 has 40 divisors (see below), whose sum is σ = 4963055856. Its totient is φ = 931479552.

The previous prime is 2173455871. The next prime is 2173455881. The reversal of 2173455872 is 2785543712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173455871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299633 + ... + 306800.

Almost surely, 2^2173455872 is an apocalyptic number.

It is an amenable number.

2173455872 is an abundant number, since it is smaller than the sum of its proper divisors (2789599984).

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

2173455872 is an frugal number, since it uses more digits than its factorization.

2173455872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606458 (or 606442 counting only the distinct ones).

The product of its digits is 470400, while the sum is 44.

The square root of 2173455872 is about 46620.3375363156. The cubic root of 2173455872 is about 1295.3394998435.

The spelling of 2173455872 in words is "two billion, one hundred seventy-three million, four hundred fifty-five thousand, eight hundred seventy-two".