251230503420125 has 8 divisors (see below), whose sum is σ = 313535668268472. Its totient is φ = 200984402736000.

The previous prime is 251230503420101. The next prime is 251230503420131. The reversal of 251230503420125 is 521024305032152.

It can be written as a sum of positive squares in 4 ways, for example, as 1652877923449 + 249577625496676 = 1285643^2 + 15798026^2 .

It is not a de Polignac number, because 251230503420125 - 2¹² = 251230503416029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004922013556 + ... + 1004922013805.

It is an arithmetic number, because the mean of its divisors is an integer number (39191958533559).

Almost surely, 2^{251230503420125} is an apocalyptic number.

251230503420125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251230503420125 is a deficient number, since it is larger than the sum of its proper divisors (62305164848347).

251230503420125 is an equidigital number, since it uses as much as digits as its factorization.

251230503420125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009844027376 (or 2009844027366 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 251230503420125 its reverse (521024305032152), we get a palindrome (772254808452277).

The spelling of 251230503420125 in words is "two hundred fifty-one trillion, two hundred thirty billion, five hundred three million, four hundred twenty thousand, one hundred twenty-five".