251024545025 has 6 divisors (see below), whose sum is σ = 311270435862. Its totient is φ = 200819636000.

The previous prime is 251024545007. The next prime is 251024545033. The reversal of 251024545025 is 520545420152.

It can be written as a sum of positive squares in 3 ways, for example, as 4143754384 + 246880790641 = 64372^2 + 496871^2 .

It is not a de Polignac number, because 251024545025 - 2²⁶ = 250957436161 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, 5020490876 + ... + 5020490925.

It is an arithmetic number, because the mean of its divisors is an integer number (51878405977).

Almost surely, 2^251024545025 is an apocalyptic number.

251024545025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251024545025 is a deficient number, since it is larger than the sum of its proper divisors (60245890837).

251024545025 is a wasteful number, since it uses less digits than its factorization.

251024545025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040981811 (or 10040981806 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

Adding to 251024545025 its reverse (520545420152), we get a palindrome (771569965177).

The spelling of 251024545025 in words is "two hundred fifty-one billion, twenty-four million, five hundred forty-five thousand, twenty-five".