515515101323 has 2 divisors, whose sum is σ = 515515101324. Its totient is φ = 515515101322.

The previous prime is 515515101271. The next prime is 515515101331. The reversal of 515515101323 is 323101515515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 515515101323 - 2⁶ = 515515101259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 515515101323.

It is not a weakly prime, because it can be changed into another prime (515515101373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257757550661 + 257757550662.

It is an arithmetic number, because the mean of its divisors is an integer number (257757550662).

Almost surely, 2^515515101323 is an apocalyptic number.

515515101323 is a deficient number, since it is larger than the sum of its proper divisors (1).

515515101323 is an equidigital number, since it uses as much as digits as its factorization.

515515101323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11250, while the sum is 32.

Adding to 515515101323 its reverse (323101515515), we get a palindrome (838616616838).

The spelling of 515515101323 in words is "five hundred fifteen billion, five hundred fifteen million, one hundred one thousand, three hundred twenty-three".