516521653 has 2 divisors, whose sum is σ = 516521654. Its totient is φ = 516521652.

The previous prime is 516521651. The next prime is 516521683. The reversal of 516521653 is 356125615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385808164 + 130713489 = 19642^2 + 11433^2 .

It is a cyclic number.

It is not a de Polignac number, because 516521653 - 2¹ = 516521651 is a prime.

Together with 516521651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516521651) 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 as a sum of consecutive naturals, namely, 258260826 + 258260827.

It is an arithmetic number, because the mean of its divisors is an integer number (258260827).

Almost surely, 2^516521653 is an apocalyptic number.

It is an amenable number.

516521653 is a deficient number, since it is larger than the sum of its proper divisors (1).

516521653 is an equidigital number, since it uses as much as digits as its factorization.

516521653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The square root of 516521653 is about 22727.1127290732. The cubic root of 516521653 is about 802.3481287254.

The spelling of 516521653 in words is "five hundred sixteen million, five hundred twenty-one thousand, six hundred fifty-three".