2561303125 has 12 divisors (see below), whose sum is σ = 3201427908. Its totient is φ = 2049040000.

The previous prime is 2561303093. The next prime is 2561303141. The reversal of 2561303125 is 5213031652.

It can be written as a sum of positive squares in 6 ways, for example, as 1322122321 + 1239180804 = 36361^2 + 35202^2 .

It is not a de Polignac number, because 2561303125 - 2⁵ = 2561303093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2561303093 and 2561303102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 406684 + ... + 412933.

It is an arithmetic number, because the mean of its divisors is an integer number (266785659).

Almost surely, 2^2561303125 is an apocalyptic number.

2561303125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2561303125 is a deficient number, since it is larger than the sum of its proper divisors (640124783).

2561303125 is an frugal number, since it uses more digits than its factorization.

2561303125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819642 (or 819622 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2561303125 is about 50609.3185589373. The cubic root of 2561303125 is about 1368.2128338432.

Adding to 2561303125 its reverse (5213031652), we get a palindrome (7774334777).

The spelling of 2561303125 in words is "two billion, five hundred sixty-one million, three hundred three thousand, one hundred twenty-five".