2195312500 has 60 divisors (see below), whose sum is σ = 4819335444. Its totient is φ = 875000000.

The previous prime is 2195312491. The next prime is 2195312513. The reversal of 2195312500 is 52135912.

It can be written as a sum of positive squares in 10 ways, for example, as 120692196 + 2074620304 = 10986^2 + 45548^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7812360 + ... + 7812640.

Almost surely, 2^2195312500 is an apocalyptic number.

2195312500 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 2195312500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2409667722).

2195312500 is an abundant number, since it is smaller than the sum of its proper divisors (2624022944).

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

2195312500 is an frugal number, since it uses more digits than its factorization.

2195312500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 2195312500 is about 46854.1620349783. The cubic root of 2195312500 is about 1299.6670745095.

It can be divided in two parts, 21953 and 12500, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 2195312500 in words is "two billion, one hundred ninety-five million, three hundred twelve thousand, five hundred".