515500241 has 2 divisors, whose sum is σ = 515500242. Its totient is φ = 515500240.

The previous prime is 515500199. The next prime is 515500273. The reversal of 515500241 is 142005515.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 468289600 + 47210641 = 21640^2 + 6871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515500241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (515500291) 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, 257750120 + 257750121.

It is an arithmetic number, because the mean of its divisors is an integer number (257750121).

Almost surely, 2^515500241 is an apocalyptic number.

It is an amenable number.

515500241 is a deficient number, since it is larger than the sum of its proper divisors (1).

515500241 is an equidigital number, since it uses as much as digits as its factorization.

515500241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 515500241 is about 22704.6303867735. The cubic root of 515500241 is about 801.8189035407.

Adding to 515500241 its reverse (142005515), we get a palindrome (657505756).

The spelling of 515500241 in words is "five hundred fifteen million, five hundred thousand, two hundred forty-one".