2187738125 has 10 divisors (see below), whose sum is σ = 2733798342. Its totient is φ = 1750190000.

The previous prime is 2187738043. The next prime is 2187738167. The reversal of 2187738125 is 5218377812.

It can be written as a sum of positive squares in 5 ways, for example, as 210424036 + 1977314089 = 14506^2 + 44467^2 .

It is not a de Polignac number, because 2187738125 - 2¹⁸ = 2187475981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1749566 + ... + 1750815.

Almost surely, 2^2187738125 is an apocalyptic number.

2187738125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2187738125 is a deficient number, since it is larger than the sum of its proper divisors (546060217).

2187738125 is an frugal number, since it uses more digits than its factorization.

2187738125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500401 (or 3500386 counting only the distinct ones).

The product of its digits is 188160, while the sum is 44.

The square root of 2187738125 is about 46773.2629287288. The cubic root of 2187738125 is about 1298.1706270931.

The spelling of 2187738125 in words is "two billion, one hundred eighty-seven million, seven hundred thirty-eight thousand, one hundred twenty-five".