516521069 has 8 divisors (see below), whose sum is σ = 519665400. Its totient is φ = 513386496.

The previous prime is 516521011. The next prime is 516521087. The reversal of 516521069 is 960125615.

It can be written as a sum of positive squares in 4 ways, for example, as 2365444 + 514155625 = 1538^2 + 22675^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516521069 is a prime.

It is a super-2 number, since 2×516521069² = 533588029441805522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516523069) 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, 122297 + ... + 126449.

It is an arithmetic number, because the mean of its divisors is an integer number (64958175).

Almost surely, 2^516521069 is an apocalyptic number.

It is an amenable number.

516521069 is a deficient number, since it is larger than the sum of its proper divisors (3144331).

516521069 is a wasteful number, since it uses less digits than its factorization.

516521069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4879.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 516521069 is about 22727.0998809791. The cubic root of 516521069 is about 802.3478263363.

The spelling of 516521069 in words is "five hundred sixteen million, five hundred twenty-one thousand, sixty-nine".