516647231 has 4 divisors (see below), whose sum is σ = 517215264. Its totient is φ = 516079200.

The previous prime is 516647203. The next prime is 516647239. The reversal of 516647231 is 132746615.

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 516647231 - 2¹⁸ = 516385087 is a prime.

It is a super-2 number, since 2×516647231² = 533848722599934722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 516647191 and 516647200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516647239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282650 + ... + 284471.

It is an arithmetic number, because the mean of its divisors is an integer number (129303816).

Almost surely, 2^516647231 is an apocalyptic number.

516647231 is a deficient number, since it is larger than the sum of its proper divisors (568033).

516647231 is an equidigital number, since it uses as much as digits as its factorization.

516647231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568032.

The product of its digits is 30240, while the sum is 35.

The square root of 516647231 is about 22729.8752966223. The cubic root of 516647231 is about 802.4131463991.

The spelling of 516647231 in words is "five hundred sixteen million, six hundred forty-seven thousand, two hundred thirty-one".