515243983 has 2 divisors, whose sum is σ = 515243984. Its totient is φ = 515243982.

The previous prime is 515243977. The next prime is 515244019. The reversal of 515243983 is 389342515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 515243983 - 2¹⁷ = 515112911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515243383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257621991 + 257621992.

It is an arithmetic number, because the mean of its divisors is an integer number (257621992).

Almost surely, 2^515243983 is an apocalyptic number.

515243983 is a deficient number, since it is larger than the sum of its proper divisors (1).

515243983 is an equidigital number, since it uses as much as digits as its factorization.

515243983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The square root of 515243983 is about 22698.9863870614. The cubic root of 515243983 is about 801.6860186593.

The spelling of 515243983 in words is "five hundred fifteen million, two hundred forty-three thousand, nine hundred eighty-three".