516522217 has 4 divisors (see below), whose sum is σ = 533184256. Its totient is φ = 499860180.

The previous prime is 516522199. The next prime is 516522241. The reversal of 516522217 is 712225615.

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 516522217 - 2¹⁹ = 515997929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 16662007 = 516522217 / (5 + 1 + 6 + 5 + 2 + 2 + 2 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516529217) 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, 8330973 + ... + 8331034.

It is an arithmetic number, because the mean of its divisors is an integer number (133296064).

Almost surely, 2^516522217 is an apocalyptic number.

It is an amenable number.

516522217 is a deficient number, since it is larger than the sum of its proper divisors (16662039).

516522217 is a wasteful number, since it uses less digits than its factorization.

516522217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16662038.

The product of its digits is 8400, while the sum is 31.

The square root of 516522217 is about 22727.1251371571. The cubic root of 516522217 is about 802.3484207584.

The spelling of 516522217 in words is "five hundred sixteen million, five hundred twenty-two thousand, two hundred seventeen".