2521255025 has 12 divisors (see below), whose sum is σ = 3202610124. Its totient is φ = 1967808000.

The previous prime is 2521255007. The next prime is 2521255031. The reversal of 2521255025 is 5205521252.

It can be written as a sum of positive squares in 6 ways, for example, as 327175744 + 2194079281 = 18088^2 + 46841^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2521255025 is a prime.

It is a Duffinian 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, 1228856 + ... + 1230905.

It is an arithmetic number, because the mean of its divisors is an integer number (266884177).

Almost surely, 2^2521255025 is an apocalyptic number.

2521255025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2521255025 is a deficient number, since it is larger than the sum of its proper divisors (681355099).

2521255025 is a wasteful number, since it uses less digits than its factorization.

2521255025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459812 (or 2459807 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 2521255025 is about 50212.1003842699. The cubic root of 2521255025 is about 1361.0442932569.

Adding to 2521255025 its reverse (5205521252), we get a palindrome (7726776277).

The spelling of 2521255025 in words is "two billion, five hundred twenty-one million, two hundred fifty-five thousand, twenty-five".