5205256517 has 4 divisors (see below), whose sum is σ = 5271145920. Its totient is φ = 5139367116.

The previous prime is 5205256489. The next prime is 5205256541. The reversal of 5205256517 is 7156525025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5205256517 - 2¹² = 5205252421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205256547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32944583 + ... + 32944740.

It is an arithmetic number, because the mean of its divisors is an integer number (1317786480).

Almost surely, 2^5205256517 is an apocalyptic number.

It is an amenable number.

5205256517 is a deficient number, since it is larger than the sum of its proper divisors (65889403).

5205256517 is an equidigital number, since it uses as much as digits as its factorization.

5205256517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65889402.

The product of its (nonzero) digits is 105000, while the sum is 38.

The square root of 5205256517 is about 72147.4636906939. The cubic root of 5205256517 is about 1733.0617833931.

The spelling of 5205256517 in words is "five billion, two hundred five million, two hundred fifty-six thousand, five hundred seventeen".