251231041 has 2 divisors, whose sum is σ = 251231042. Its totient is φ = 251231040.

The previous prime is 251231009. The next prime is 251231051. The reversal of 251231041 is 140132152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240374016 + 10857025 = 15504^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 251231041 - 2⁵ = 251231009 is a prime.

It is not a weakly prime, because it can be changed into another prime (251231051) 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, 125615520 + 125615521.

It is an arithmetic number, because the mean of its divisors is an integer number (125615521).

Almost surely, 2^251231041 is an apocalyptic number.

It is an amenable number.

251231041 is a deficient number, since it is larger than the sum of its proper divisors (1).

251231041 is an equidigital number, since it uses as much as digits as its factorization.

251231041 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 251231041 is about 15850.2694298867. The cubic root of 251231041 is about 630.9928420103.

Adding to 251231041 its reverse (140132152), we get a palindrome (391363193).

The spelling of 251231041 in words is "two hundred fifty-one million, two hundred thirty-one thousand, forty-one".