2505813725 has 6 divisors (see below), whose sum is σ = 3107209050. Its totient is φ = 2004650960.

The previous prime is 2505813703. The next prime is 2505813749. The reversal of 2505813725 is 5273185052.

It can be written as a sum of positive squares in 3 ways, for example, as 347375044 + 2158438681 = 18638^2 + 46459^2 .

It is not a de Polignac number, because 2505813725 - 2²⁰ = 2504765149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50116250 + ... + 50116299.

It is an arithmetic number, because the mean of its divisors is an integer number (517868175).

Almost surely, 2^2505813725 is an apocalyptic number.

2505813725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2505813725 is a deficient number, since it is larger than the sum of its proper divisors (601395325).

2505813725 is a wasteful number, since it uses less digits than its factorization.

2505813725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100232559 (or 100232554 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 2505813725 is about 50058.1034898447. The cubic root of 2505813725 is about 1358.2600523361.

Adding to 2505813725 its reverse (5273185052), we get a palindrome (7778998777).

It can be divided in two parts, 25058 and 13725, that added together give a palindrome (38783).

The spelling of 2505813725 in words is "two billion, five hundred five million, eight hundred thirteen thousand, seven hundred twenty-five".