2157602500 has 45 divisors (see below), whose sum is σ = 4723329457. Its totient is φ = 862112000.

The previous prime is 2157602479. The next prime is 2157602507. The reversal of 2157602500 is 52067512.

The square root of 2157602500 is 46450.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 2112873156 + 44729344 = 45966^2 + 6688^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157602507) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2322036 + ... + 2322964.

Almost surely, 2^2157602500 is an apocalyptic number.

2157602500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

2157602500 is the 46450-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2157602500

2157602500 is an abundant number, since it is smaller than the sum of its proper divisors (2565726957).

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

2157602500 is an frugal number, since it uses more digits than its factorization.

2157602500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The cubic root of 2157602500 is about 1292.1823724067.

The spelling of 2157602500 in words is "two billion, one hundred fifty-seven million, six hundred two thousand, five hundred".