516205399 has 4 divisors (see below), whose sum is σ = 538649136. Its totient is φ = 493761664.

The previous prime is 516205387. The next prime is 516205421. The reversal of 516205399 is 993502615.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 516205399 - 2⁷ = 516205271 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 (516205309) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 11221834 + ... + 11221879.

It is an arithmetic number, because the mean of its divisors is an integer number (134662284).

Almost surely, 2^516205399 is an apocalyptic number.

516205399 is a deficient number, since it is larger than the sum of its proper divisors (22443737).

516205399 is a wasteful number, since it uses less digits than its factorization.

516205399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22443736.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 516205399 is about 22720.1540267666. The cubic root of 516205399 is about 802.1843423615.

The spelling of 516205399 in words is "five hundred sixteen million, two hundred five thousand, three hundred ninety-nine".