515128063 has 2 divisors, whose sum is σ = 515128064. Its totient is φ = 515128062.

The previous prime is 515128051. The next prime is 515128069. The reversal of 515128063 is 360821515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 515128063 - 2²¹ = 513030911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515128069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257564031 + 257564032.

It is an arithmetic number, because the mean of its divisors is an integer number (257564032).

Almost surely, 2^515128063 is an apocalyptic number.

515128063 is a deficient number, since it is larger than the sum of its proper divisors (1).

515128063 is an equidigital number, since it uses as much as digits as its factorization.

515128063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 515128063 is about 22696.4328254464. The cubic root of 515128063 is about 801.6258928312.

Adding to 515128063 its reverse (360821515), we get a palindrome (875949578).

The spelling of 515128063 in words is "five hundred fifteen million, one hundred twenty-eight thousand, sixty-three".