251903225425 has 6 divisors (see below), whose sum is σ = 312359999558. Its totient is φ = 201522580320.

The previous prime is 251903225389. The next prime is 251903225461. The reversal of 251903225425 is 524522309152.

251903225425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (251903225389) and next prime (251903225461).

It can be written as a sum of positive squares in 3 ways, for example, as 1656164416 + 250247061009 = 40696^2 + 500247^2 .

It is not a de Polignac number, because 251903225425 - 2⁹ = 251903224913 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, 5038064484 + ... + 5038064533.

Almost surely, 2^251903225425 is an apocalyptic number.

251903225425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251903225425 is a deficient number, since it is larger than the sum of its proper divisors (60456774133).

251903225425 is a wasteful number, since it uses less digits than its factorization.

251903225425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076129027 (or 10076129022 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 251903225425 in words is "two hundred fifty-one billion, nine hundred three million, two hundred twenty-five thousand, four hundred twenty-five".