517448596921 has 9 divisors (see below), whose sum is σ = 518962901583. Its totient is φ = 515938704360.

The previous prime is 517448596919. The next prime is 517448596933. The reversal of 517448596921 is 129695844715.

The square root of 517448596921 is 719339.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 276033601321 + 241414995600 = 525389^2 + 491340^2 .

It is not a de Polignac number, because 517448596921 - 2¹ = 517448596919 is a prime.

It is a Duffinian number.

Its product of digits (21772800) is a multiple of the sum of its prime divisors (2100).

It is a self number, because there is not a number n which added to its sum of digits gives 517448596921.

It is not an unprimeable number, because it can be changed into a prime (517448596961) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 310034275 + ... + 310035943.

Almost surely, 2^517448596921 is an apocalyptic number.

517448596921 is the 719339-th square number.

517448596921 is the 359670-th centered octagonal number.

It is an amenable number.

517448596921 is a deficient number, since it is larger than the sum of its proper divisors (1514304662).

517448596921 is an frugal number, since it uses more digits than its factorization.

517448596921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200 (or 2100 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 61.

The spelling of 517448596921 in words is "five hundred seventeen billion, four hundred forty-eight million, five hundred ninety-six thousand, nine hundred twenty-one".