516561827 has 2 divisors, whose sum is σ = 516561828. Its totient is φ = 516561826.

The previous prime is 516561817. The next prime is 516561839. The reversal of 516561827 is 728165615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 516561827 - 2⁴ = 516561811 is a prime.

It is a super-3 number, since 3×516561827³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (516561817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258280913 + 258280914.

It is an arithmetic number, because the mean of its divisors is an integer number (258280914).

Almost surely, 2^516561827 is an apocalyptic number.

516561827 is a deficient number, since it is larger than the sum of its proper divisors (1).

516561827 is an equidigital number, since it uses as much as digits as its factorization.

516561827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 516561827 is about 22727.9965461103. The cubic root of 516561827 is about 802.3689298527.

The spelling of 516561827 in words is "five hundred sixteen million, five hundred sixty-one thousand, eight hundred twenty-seven".