2187591125 has 16 divisors (see below), whose sum is σ = 2873807040. Its totient is φ = 1657962000.

The previous prime is 2187591113. The next prime is 2187591143. The reversal of 2187591125 is 5211957812.

It is not a de Polignac number, because 2187591125 - 2⁶ = 2187591061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458171 + ... + 462920.

It is an arithmetic number, because the mean of its divisors is an integer number (179612940).

Almost surely, 2^2187591125 is an apocalyptic number.

2187591125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2187591125 is a deficient number, since it is larger than the sum of its proper divisors (686215915).

2187591125 is an equidigital number, since it uses as much as digits as its factorization.

2187591125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921125 (or 921115 counting only the distinct ones).

The product of its digits is 50400, while the sum is 41.

The square root of 2187591125 is about 46771.6914917560. The cubic root of 2187591125 is about 1298.1415505849.

The spelling of 2187591125 in words is "two billion, one hundred eighty-seven million, five hundred ninety-one thousand, one hundred twenty-five".