2551240025 has 12 divisors (see below), whose sum is σ = 3164466732. Its totient is φ = 2040392640.
The previous prime is 2551240019. The next prime is 2551240033. The reversal of 2551240025 is 5200421552.
It can be written as a sum of positive squares in 6 ways, for example, as 112954384 + 2438285641 = 10628^2 + 49379^2 .
It is not a de Polignac number, because 2551240025 - 230 = 1477498201 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 2551239976 and 2551240003.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84899 + ... + 110951.
It is an arithmetic number, because the mean of its divisors is an integer number (263705561).
Almost surely, 22551240025 is an apocalyptic number.
2551240025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.
It is an amenable number.
2551240025 is a deficient number, since it is larger than the sum of its proper divisors (613226707).
2551240025 is a wasteful number, since it uses less digits than its factorization.
2551240025 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 29980 (or 29975 counting only the distinct ones).
The product of its (nonzero) digits is 4000, while the sum is 26.
The square root of 2551240025 is about 50509.8012765839. The cubic root of 2551240025 is about 1366.4186255844.
Adding to 2551240025 its reverse (5200421552), we get a palindrome (7751661577).
The spelling of 2551240025 in words is "two billion, five hundred fifty-one million, two hundred forty thousand, twenty-five".
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