517648881 has 8 divisors (see below), whose sum is σ = 712463104. Its totient is φ = 333966960.

The previous prime is 517648853. The next prime is 517648889. The reversal of 517648881 is 188846715.

It is a happy number.

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

It is not a de Polignac number, because 517648881 - 2¹⁹ = 517124593 is a prime.

It is a super-2 number, since 2×517648881² = 535920728001104322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 517648881.

It is not an unprimeable number, because it can be changed into a prime (517648889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2782966 + ... + 2783151.

It is an arithmetic number, because the mean of its divisors is an integer number (89057888).

Almost surely, 2^517648881 is an apocalyptic number.

It is an amenable number.

517648881 is a deficient number, since it is larger than the sum of its proper divisors (194814223).

517648881 is a wasteful number, since it uses less digits than its factorization.

517648881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5566151.

The product of its digits is 430080, while the sum is 48.

The square root of 517648881 is about 22751.8984043090. The cubic root of 517648881 is about 802.9313712299.

The spelling of 517648881 in words is "five hundred seventeen million, six hundred forty-eight thousand, eight hundred eighty-one".