516516401 has 4 divisors (see below), whose sum is σ = 529114404. Its totient is φ = 503918400.

The previous prime is 516516383. The next prime is 516516433. The reversal of 516516401 is 104615615.

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 286963600 + 229552801 = 16940^2 + 15151^2 .

It is a cyclic number.

It is not a de Polignac number, because 516516401 - 2¹⁸ = 516254257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516516001) 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, 6298940 + ... + 6299021.

It is an arithmetic number, because the mean of its divisors is an integer number (132278601).

Almost surely, 2^516516401 is an apocalyptic number.

It is an amenable number.

516516401 is a deficient number, since it is larger than the sum of its proper divisors (12598003).

516516401 is a wasteful number, since it uses less digits than its factorization.

516516401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12598002.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 516516401 is about 22726.9971839660. The cubic root of 516516401 is about 802.3454092868.

The spelling of 516516401 in words is "five hundred sixteen million, five hundred sixteen thousand, four hundred one".