516816915 has 16 divisors (see below), whose sum is σ = 875549088. Its totient is φ = 259421696.

The previous prime is 516816901. The next prime is 516816919. The reversal of 516816915 is 519618615.

It is a cyclic number.

It is not a de Polignac number, because 516816915 - 2⁷ = 516816787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (516816919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1013112 + ... + 1013621.

It is an arithmetic number, because the mean of its divisors is an integer number (54721818).

Almost surely, 2^516816915 is an apocalyptic number.

516816915 is a deficient number, since it is larger than the sum of its proper divisors (358732173).

516816915 is a wasteful number, since it uses less digits than its factorization.

516816915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026758.

The product of its digits is 64800, while the sum is 42.

The square root of 516816915 is about 22733.6076107599. The cubic root of 516816915 is about 802.5009831026.

The spelling of 516816915 in words is "five hundred sixteen million, eight hundred sixteen thousand, nine hundred fifteen".