2172352820 has 48 divisors (see below), whose sum is σ = 5269416768. Its totient is φ = 743477760.

The previous prime is 2172352813. The next prime is 2172352873. The reversal of 2172352820 is 282532712.

2172352820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286682 + ... + 294161.

It is an arithmetic number, because the mean of its divisors is an integer number (109779516).

Almost surely, 2^2172352820 is an apocalyptic number.

2172352820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2172352820 is an abundant number, since it is smaller than the sum of its proper divisors (3097063948).

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

2172352820 is a wasteful number, since it uses less digits than its factorization.

2172352820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580880 (or 580878 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 2172352820 is about 46608.5058760737. The cubic root of 2172352820 is about 1295.1203298989.

The spelling of 2172352820 in words is "two billion, one hundred seventy-two million, three hundred fifty-two thousand, eight hundred twenty".