2531256425 has 6 divisors (see below), whose sum is σ = 3138757998. Its totient is φ = 2025005120.

The previous prime is 2531256407. The next prime is 2531256473. The reversal of 2531256425 is 5246521352.

It can be written as a sum of positive squares in 3 ways, for example, as 380523049 + 2150733376 = 19507^2 + 46376^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2531256425 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 (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50625104 + ... + 50625153.

It is an arithmetic number, because the mean of its divisors is an integer number (523126333).

Almost surely, 2^2531256425 is an apocalyptic number.

2531256425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2531256425 is a deficient number, since it is larger than the sum of its proper divisors (607501573).

2531256425 is a wasteful number, since it uses less digits than its factorization.

2531256425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101250267 (or 101250262 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 2531256425 is about 50311.5933458681. The cubic root of 2531256425 is about 1362.8415977095.

Adding to 2531256425 its reverse (5246521352), we get a palindrome (7777777777).

The spelling of 2531256425 in words is "two billion, five hundred thirty-one million, two hundred fifty-six thousand, four hundred twenty-five".