251125803 has 6 divisors (see below), whose sum is σ = 362737284. Its totient is φ = 167417196.

The previous prime is 251125783. The next prime is 251125811. The reversal of 251125803 is 308521152.

It is a happy number.

It is not a de Polignac number, because 251125803 - 2⁹ = 251125291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251125843) by changing a digit.

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, 13951425 + ... + 13951442.

It is an arithmetic number, because the mean of its divisors is an integer number (60456214).

Almost surely, 2^251125803 is an apocalyptic number.

251125803 is a deficient number, since it is larger than the sum of its proper divisors (111611481).

251125803 is a wasteful number, since it uses less digits than its factorization.

251125803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27902873 (or 27902870 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 251125803 is about 15846.9493278675. The cubic root of 251125803 is about 630.9047243178.

Adding to 251125803 its reverse (308521152), we get a palindrome (559646955).

The spelling of 251125803 in words is "two hundred fifty-one million, one hundred twenty-five thousand, eight hundred three".