516400013 has 4 divisors (see below), whose sum is σ = 534206940. Its totient is φ = 498593088.

The previous prime is 516399941. The next prime is 516400019. The reversal of 516400013 is 310004615.

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

It can be written as a sum of positive squares in 2 ways, for example, as 141086884 + 375313129 = 11878^2 + 19373^2 .

It is a cyclic number.

It is not a de Polignac number, because 516400013 - 2¹² = 516395917 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 (516400019) 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, 8903420 + ... + 8903477.

It is an arithmetic number, because the mean of its divisors is an integer number (133551735).

Almost surely, 2^516400013 is an apocalyptic number.

It is an amenable number.

516400013 is a deficient number, since it is larger than the sum of its proper divisors (17806927).

516400013 is a wasteful number, since it uses less digits than its factorization.

516400013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17806926.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 516400013 is about 22724.4364726609. The cubic root of 516400013 is about 802.2851398921.

Adding to 516400013 its reverse (310004615), we get a palindrome (826404628).

The spelling of 516400013 in words is "five hundred sixteen million, four hundred thousand, thirteen".