516391869 has 16 divisors (see below), whose sum is σ = 808151168. Its totient is φ = 287105472.

The previous prime is 516391849. The next prime is 516391873. The reversal of 516391869 is 968193615.

It is not a de Polignac number, because 516391869 - 2⁸ = 516391613 is a prime.

It is a super-2 number, since 2×516391869² = 533321124738626322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516391829) 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, 331522 + ... + 333075.

It is an arithmetic number, because the mean of its divisors is an integer number (50509448).

Almost surely, 2^516391869 is an apocalyptic number.

It is an amenable number.

516391869 is a deficient number, since it is larger than the sum of its proper divisors (291759299).

516391869 is a wasteful number, since it uses less digits than its factorization.

516391869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664644.

The product of its digits is 349920, while the sum is 48.

The square root of 516391869 is about 22724.2572815923. The cubic root of 516391869 is about 802.2809223319.

The spelling of 516391869 in words is "five hundred sixteen million, three hundred ninety-one thousand, eight hundred sixty-nine".