515542868 has 6 divisors (see below), whose sum is σ = 902200026. Its totient is φ = 257771432.

The previous prime is 515542849. The next prime is 515542873. The reversal of 515542868 is 868245515.

It can be written as a sum of positive squares in only one way, i.e., 274299844 + 241243024 = 16562^2 + 15532^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64442855 + ... + 64442862.

It is an arithmetic number, because the mean of its divisors is an integer number (150366671).

Almost surely, 2^515542868 is an apocalyptic number.

It is an amenable number.

515542868 is a deficient number, since it is larger than the sum of its proper divisors (386657158).

515542868 is a wasteful number, since it uses less digits than its factorization.

515542868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128885721 (or 128885719 counting only the distinct ones).

The product of its digits is 384000, while the sum is 44.

The square root of 515542868 is about 22705.5690965895. The cubic root of 515542868 is about 801.8410038810.

The spelling of 515542868 in words is "five hundred fifteen million, five hundred forty-two thousand, eight hundred sixty-eight".