515530163231 has 2 divisors, whose sum is σ = 515530163232. Its totient is φ = 515530163230.

The previous prime is 515530163201. The next prime is 515530163279. The reversal of 515530163231 is 132361035515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 515530163231 - 2¹⁰ = 515530162207 is a prime.

It is a super-2 number, since 2×515530163231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 515530163191 and 515530163200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515530163201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257765081615 + 257765081616.

It is an arithmetic number, because the mean of its divisors is an integer number (257765081616).

Almost surely, 2^515530163231 is an apocalyptic number.

515530163231 is a deficient number, since it is larger than the sum of its proper divisors (1).

515530163231 is an equidigital number, since it uses as much as digits as its factorization.

515530163231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40500, while the sum is 35.

Adding to 515530163231 its reverse (132361035515), we get a palindrome (647891198746).

The spelling of 515530163231 in words is "five hundred fifteen billion, five hundred thirty million, one hundred sixty-three thousand, two hundred thirty-one".