251031264425 has 12 divisors (see below), whose sum is σ = 311293172316. Its totient is φ = 200815718400.

The previous prime is 251031264397. The next prime is 251031264467. The reversal of 251031264425 is 524462130152.

It can be written as a sum of positive squares in 6 ways, for example, as 107412496 + 250923851929 = 10364^2 + 500923^2 .

It is not a de Polignac number, because 251031264425 - 2¹⁰ = 251031263401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347057 + ... + 788993.

It is an arithmetic number, because the mean of its divisors is an integer number (25941097693).

Almost surely, 2^251031264425 is an apocalyptic number.

251031264425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251031264425 is a deficient number, since it is larger than the sum of its proper divisors (60261907891).

251031264425 is a wasteful number, since it uses less digits than its factorization.

251031264425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464668 (or 464663 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 251031264425 its reverse (524462130152), we get a palindrome (775493394577).

The spelling of 251031264425 in words is "two hundred fifty-one billion, thirty-one million, two hundred sixty-four thousand, four hundred twenty-five".