517443145 has 4 divisors (see below), whose sum is σ = 620931780. Its totient is φ = 413954512.

The previous prime is 517443139. The next prime is 517443151. The reversal of 517443145 is 541344715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541344715 = 5 ⋅108268943.

It is an interprime number because it is at equal distance from previous prime (517443139) and next prime (517443151).

It can be written as a sum of positive squares in 2 ways, for example, as 128051856 + 389391289 = 11316^2 + 19733^2 .

It is a cyclic number.

It is not a de Polignac number, because 517443145 - 2⁹ = 517442633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 517443145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51744310 + ... + 51744319.

It is an arithmetic number, because the mean of its divisors is an integer number (155232945).

Almost surely, 2^517443145 is an apocalyptic number.

It is an amenable number.

517443145 is a deficient number, since it is larger than the sum of its proper divisors (103488635).

517443145 is a wasteful number, since it uses less digits than its factorization.

517443145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103488634.

The product of its digits is 33600, while the sum is 34.

The square root of 517443145 is about 22747.3766619362. The cubic root of 517443145 is about 802.8249839442.

The spelling of 517443145 in words is "five hundred seventeen million, four hundred forty-three thousand, one hundred forty-five".