515515042303 has 2 divisors, whose sum is σ = 515515042304. Its totient is φ = 515515042302.

The previous prime is 515515042291. The next prime is 515515042319. The reversal of 515515042303 is 303240515515.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515515042303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515515042363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257757521151 + 257757521152.

It is an arithmetic number, because the mean of its divisors is an integer number (257757521152).

Almost surely, 2^515515042303 is an apocalyptic number.

515515042303 is a deficient number, since it is larger than the sum of its proper divisors (1).

515515042303 is an equidigital number, since it uses as much as digits as its factorization.

515515042303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 515515042303 its reverse (303240515515), we get a palindrome (818755557818).

The spelling of 515515042303 in words is "five hundred fifteen billion, five hundred fifteen million, forty-two thousand, three hundred three".