517256714242 has 8 divisors (see below), whose sum is σ = 779562252432. Its totient is φ = 257402630100.

The previous prime is 517256714239. The next prime is 517256714269. The reversal of 517256714242 is 242417652715.

It is a happy number.

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 = 517256714192 and 517256714201.

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, 612862984 + ... + 612863827.

It is an arithmetic number, because the mean of its divisors is an integer number (97445281554).

Almost surely, 2^517256714242 is an apocalyptic number.

517256714242 is a deficient number, since it is larger than the sum of its proper divisors (262305538190).

517256714242 is a wasteful number, since it uses less digits than its factorization.

517256714242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225727024.

The product of its digits is 940800, while the sum is 46.

The spelling of 517256714242 in words is "five hundred seventeen billion, two hundred fifty-six million, seven hundred fourteen thousand, two hundred forty-two".