2125173500 has 96 divisors (see below), whose sum is σ = 4815720000. Its totient is φ = 818688000.

The previous prime is 2125173497. The next prime is 2125173517. The reversal of 2125173500 is 53715212.

It is a self number, because there is not a number n which added to its sum of digits gives 2125173500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1700876 + ... + 1702124.

It is an arithmetic number, because the mean of its divisors is an integer number (50163750).

Almost surely, 2^2125173500 is an apocalyptic number.

2125173500 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 2125173500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407860000).

2125173500 is an abundant number, since it is smaller than the sum of its proper divisors (2690546500).

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

2125173500 is a wasteful number, since it uses less digits than its factorization.

2125173500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2125173500 is about 46099.6041197753. The cubic root of 2125173500 is about 1285.6757839734.

Adding to 2125173500 its reverse (53715212), we get a palindrome (2178888712).

The spelling of 2125173500 in words is "two billion, one hundred twenty-five million, one hundred seventy-three thousand, five hundred".