251135124325 has 6 divisors (see below), whose sum is σ = 311407554194. Its totient is φ = 200908099440.

The previous prime is 251135124319. The next prime is 251135124343. The reversal of 251135124325 is 523421531152.

It can be written as a sum of positive squares in 3 ways, for example, as 65889242721 + 185245881604 = 256689^2 + 430402^2 .

It is not a de Polignac number, because 251135124325 - 2⁵ = 251135124293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5022702462 + ... + 5022702511.

Almost surely, 2^251135124325 is an apocalyptic number.

251135124325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251135124325 is a deficient number, since it is larger than the sum of its proper divisors (60272429869).

251135124325 is a wasteful number, since it uses less digits than its factorization.

251135124325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10045404983 (or 10045404978 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

Adding to 251135124325 its reverse (523421531152), we get a palindrome (774556655477).

The spelling of 251135124325 in words is "two hundred fifty-one billion, one hundred thirty-five million, one hundred twenty-four thousand, three hundred twenty-five".