2143125025 has 6 divisors (see below), whose sum is σ = 2657475062. Its totient is φ = 1714500000.

The previous prime is 2143125001. The next prime is 2143125029. The reversal of 2143125025 is 5205213412.

It can be written as a sum of positive squares in 3 ways, for example, as 6466849 + 2136658176 = 2543^2 + 46224^2 .

It is not a de Polignac number, because 2143125025 - 2⁵ = 2143124993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 85725001 = 2143125025 / (2 + 1 + 4 + 3 + 1 + 2 + 5 + 0 + 2 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143125029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42862476 + ... + 42862525.

Almost surely, 2^2143125025 is an apocalyptic number.

2143125025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2143125025 is a deficient number, since it is larger than the sum of its proper divisors (514350037).

2143125025 is an equidigital number, since it uses as much as digits as its factorization.

2143125025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85725011 (or 85725006 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2143125025 is about 46293.8983560469. The cubic root of 2143125025 is about 1289.2857101640.

Adding to 2143125025 its reverse (5205213412), we get a palindrome (7348338437).

The spelling of 2143125025 in words is "two billion, one hundred forty-three million, one hundred twenty-five thousand, twenty-five".