2172428125 has 48 divisors (see below), whose sum is σ = 3170797056. Its totient is φ = 1457280000.

The previous prime is 2172428119. The next prime is 2172428149. The reversal of 2172428125 is 5218242712.

It is not a de Polignac number, because 2172428125 - 2¹³ = 2172419933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1027069 + ... + 1029181.

It is an arithmetic number, because the mean of its divisors is an integer number (66058272).

Almost surely, 2^2172428125 is an apocalyptic number.

2172428125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2172428125 is a deficient number, since it is larger than the sum of its proper divisors (998368931).

2172428125 is an frugal number, since it uses more digits than its factorization.

2172428125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2172 counting only the distinct ones).

The product of its digits is 17920, while the sum is 34.

The square root of 2172428125 is about 46609.3137151793. The cubic root of 2172428125 is about 1295.1352949188.

The spelling of 2172428125 in words is "two billion, one hundred seventy-two million, four hundred twenty-eight thousand, one hundred twenty-five".