515716399 has 6 divisors (see below), whose sum is σ = 566861960. Its totient is φ = 468832980.

The previous prime is 515716391. The next prime is 515716417. The reversal of 515716399 is 993617515.

It is not a de Polignac number, because 515716399 - 2³ = 515716391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515716391) 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 in 5 ways as a sum of consecutive naturals, for example, 2130939 + ... + 2131180.

Almost surely, 2^515716399 is an apocalyptic number.

515716399 is a deficient number, since it is larger than the sum of its proper divisors (51145561).

515716399 is a wasteful number, since it uses less digits than its factorization.

515716399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262141 (or 4262130 counting only the distinct ones).

The product of its digits is 255150, while the sum is 46.

The square root of 515716399 is about 22709.3901062974. The cubic root of 515716399 is about 801.9309599713.

It can be divided in two parts, 51571 and 6399, that added together give a triangular number (57970 = T₃₄₀).

The spelling of 515716399 in words is "five hundred fifteen million, seven hundred sixteen thousand, three hundred ninety-nine".