515631241 has 2 divisors, whose sum is σ = 515631242. Its totient is φ = 515631240.

The previous prime is 515631229. The next prime is 515631251. The reversal of 515631241 is 142136515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467467641 + 48163600 = 21621^2 + 6940^2 .

It is a cyclic number.

It is not a de Polignac number, because 515631241 - 2⁷ = 515631113 is a prime.

It is not a weakly prime, because it can be changed into another prime (515631251) 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, 257815620 + 257815621.

It is an arithmetic number, because the mean of its divisors is an integer number (257815621).

Almost surely, 2^515631241 is an apocalyptic number.

It is an amenable number.

515631241 is a deficient number, since it is larger than the sum of its proper divisors (1).

515631241 is an equidigital number, since it uses as much as digits as its factorization.

515631241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 515631241 is about 22707.5150776125. The cubic root of 515631241 is about 801.8868177541.

Adding to 515631241 its reverse (142136515), we get a palindrome (657767756).

The spelling of 515631241 in words is "five hundred fifteen million, six hundred thirty-one thousand, two hundred forty-one".