2115782500 has 60 divisors (see below), whose sum is σ = 4982776876. Its totient is φ = 781200000.

The previous prime is 2115782479. The next prime is 2115782531. The reversal of 2115782500 is 52875112.

It can be written as a sum of positive squares in 10 ways, for example, as 1633453056 + 482329444 = 40416^2 + 21962^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51 + ... + 65050.

Almost surely, 2^2115782500 is an apocalyptic number.

2115782500 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 2115782500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2491388438).

2115782500 is an abundant number, since it is smaller than the sum of its proper divisors (2866994376).

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

2115782500 is a wasteful number, since it uses less digits than its factorization.

2115782500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65138 (or 65121 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 2115782500 is about 45997.6358088109. The cubic root of 2115782500 is about 1283.7792157657.

The spelling of 2115782500 in words is "two billion, one hundred fifteen million, seven hundred eighty-two thousand, five hundred".