516518447 has 4 divisors (see below), whose sum is σ = 516945480. Its totient is φ = 516091416.

The previous prime is 516518423. The next prime is 516518473. The reversal of 516518447 is 744815615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 516518447 - 2¹⁸ = 516256303 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 (516518407) by changing a digit.

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, 211697 + ... + 214122.

It is an arithmetic number, because the mean of its divisors is an integer number (129236370).

Almost surely, 2^516518447 is an apocalyptic number.

516518447 is a deficient number, since it is larger than the sum of its proper divisors (427033).

516518447 is a wasteful number, since it uses less digits than its factorization.

516518447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427032.

The product of its digits is 134400, while the sum is 41.

The square root of 516518447 is about 22727.0421964672. The cubic root of 516518447 is about 802.3464686895.

The spelling of 516518447 in words is "five hundred sixteen million, five hundred eighteen thousand, four hundred forty-seven".