516564921 has 8 divisors (see below), whose sum is σ = 703407744. Its totient is φ = 337049360.

The previous prime is 516564911. The next prime is 516564931. The reversal of 516564921 is 129465615.

It is an interprime number because it is at equal distance from previous prime (516564911) and next prime (516564931).

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

It is a cyclic number.

It is not a de Polignac number, because 516564921 - 2⁷ = 516564793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 516564921.

It is not an unprimeable number, because it can be changed into a prime (516564911) 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 7 ways as a sum of consecutive naturals, for example, 1831650 + ... + 1831931.

It is an arithmetic number, because the mean of its divisors is an integer number (87925968).

Almost surely, 2^516564921 is an apocalyptic number.

It is an amenable number.

516564921 is a deficient number, since it is larger than the sum of its proper divisors (186842823).

516564921 is a wasteful number, since it uses less digits than its factorization.

516564921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663631.

The product of its digits is 64800, while the sum is 39.

The square root of 516564921 is about 22728.0646118406. The cubic root of 516564921 is about 802.3705318065.

The spelling of 516564921 in words is "five hundred sixteen million, five hundred sixty-four thousand, nine hundred twenty-one".