2131186025 has 6 divisors (see below), whose sum is σ = 2642670702. Its totient is φ = 1704948800.

The previous prime is 2131186009. The next prime is 2131186033. The reversal of 2131186025 is 5206811312.

It can be written as a sum of positive squares in 3 ways, for example, as 397962601 + 1733223424 = 19949^2 + 41632^2 .

It is not a de Polignac number, because 2131186025 - 2⁴ = 2131186009 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 42623696 + ... + 42623745.

It is an arithmetic number, because the mean of its divisors is an integer number (440445117).

Almost surely, 2^2131186025 is an apocalyptic number.

2131186025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2131186025 is a deficient number, since it is larger than the sum of its proper divisors (511484677).

2131186025 is an equidigital number, since it uses as much as digits as its factorization.

2131186025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85247451 (or 85247446 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2131186025 is about 46164.7703882517. The cubic root of 2131186025 is about 1286.8871171022.

Adding to 2131186025 its reverse (5206811312), we get a palindrome (7337997337).

The spelling of 2131186025 in words is "two billion, one hundred thirty-one million, one hundred eighty-six thousand, twenty-five".