251125145237 has 2 divisors, whose sum is σ = 251125145238. Its totient is φ = 251125145236.

The previous prime is 251125145221. The next prime is 251125145281. The reversal of 251125145237 is 732541521152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231424496356 + 19700648881 = 481066^2 + 140359^2 .

It is a cyclic number.

It is not a de Polignac number, because 251125145237 - 2⁴ = 251125145221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251125145237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251125145207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125562572618 + 125562572619.

It is an arithmetic number, because the mean of its divisors is an integer number (125562572619).

Almost surely, 2^251125145237 is an apocalyptic number.

It is an amenable number.

251125145237 is a deficient number, since it is larger than the sum of its proper divisors (1).

251125145237 is an equidigital number, since it uses as much as digits as its factorization.

251125145237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 38.

Adding to 251125145237 its reverse (732541521152), we get a palindrome (983666666389).

The spelling of 251125145237 in words is "two hundred fifty-one billion, one hundred twenty-five million, one hundred forty-five thousand, two hundred thirty-seven".