516506387 has 4 divisors (see below), whose sum is σ = 516553800. Its totient is φ = 516458976.

The previous prime is 516506371. The next prime is 516506401. The reversal of 516506387 is 783605615.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 516506387 - 2⁴ = 516506371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516506687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739 + ... + 32187.

It is an arithmetic number, because the mean of its divisors is an integer number (129138450).

Almost surely, 2^516506387 is an apocalyptic number.

516506387 is a deficient number, since it is larger than the sum of its proper divisors (47413).

516506387 is a wasteful number, since it uses less digits than its factorization.

516506387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47412.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 516506387 is about 22726.7768722272. The cubic root of 516506387 is about 802.3402240763.

The spelling of 516506387 in words is "five hundred sixteen million, five hundred six thousand, three hundred eighty-seven".