516733393021 has 2 divisors, whose sum is σ = 516733393022. Its totient is φ = 516733393020.

The previous prime is 516733393013. The next prime is 516733393037. The reversal of 516733393021 is 120393337615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297831056121 + 218902336900 = 545739^2 + 467870^2 .

It is a cyclic number.

It is not a de Polignac number, because 516733393021 - 2³ = 516733393013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516733393051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258366696510 + 258366696511.

It is an arithmetic number, because the mean of its divisors is an integer number (258366696511).

Almost surely, 2^516733393021 is an apocalyptic number.

It is an amenable number.

516733393021 is a deficient number, since it is larger than the sum of its proper divisors (1).

516733393021 is an equidigital number, since it uses as much as digits as its factorization.

516733393021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 43.

The spelling of 516733393021 in words is "five hundred sixteen billion, seven hundred thirty-three million, three hundred ninety-three thousand, twenty-one".