515660313242 has 8 divisors (see below), whose sum is σ = 773514630336. Its totient is φ = 257822103132.

The previous prime is 515660313197. The next prime is 515660313257. The reversal of 515660313242 is 242313066515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 515660313196 and 515660313205.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3946388 + ... + 4074959.

It is an arithmetic number, because the mean of its divisors is an integer number (96689328792).

Almost surely, 2^515660313242 is an apocalyptic number.

515660313242 is a deficient number, since it is larger than the sum of its proper divisors (257854317094).

515660313242 is a wasteful number, since it uses less digits than its factorization.

515660313242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053492.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 515660313242 its reverse (242313066515), we get a palindrome (757973379757).

The spelling of 515660313242 in words is "five hundred fifteen billion, six hundred sixty million, three hundred thirteen thousand, two hundred forty-two".