251130241 has 2 divisors, whose sum is σ = 251130242. Its totient is φ = 251130240.

The previous prime is 251130199. The next prime is 251130247. The reversal of 251130241 is 142031152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235162225 + 15968016 = 15335^2 + 3996^2 .

It is a cyclic number.

It is not a de Polignac number, because 251130241 - 2¹¹ = 251128193 is a prime.

It is not a weakly prime, because it can be changed into another prime (251130247) 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 as a sum of consecutive naturals, namely, 125565120 + 125565121.

It is an arithmetic number, because the mean of its divisors is an integer number (125565121).

Almost surely, 2^251130241 is an apocalyptic number.

It is an amenable number.

251130241 is a deficient number, since it is larger than the sum of its proper divisors (1).

251130241 is an equidigital number, since it uses as much as digits as its factorization.

251130241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 251130241 is about 15847.0893542000. The cubic root of 251130241 is about 630.9084408331.

Adding to 251130241 its reverse (142031152), we get a palindrome (393161393).

The spelling of 251130241 in words is "two hundred fifty-one million, one hundred thirty thousand, two hundred forty-one".