516081 has 4 divisors (see below), whose sum is σ = 688112. Its totient is φ = 344052.

The previous prime is 516077. The next prime is 516091. The reversal of 516081 is 180615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 516081 - 2² = 516077 is a prime.

It is a super-2 number, since 2×516081² = 532679197122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

516081 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 516081.

It is not an unprimeable number, because it can be changed into a prime (516091) 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, 86011 + ... + 86016.

It is an arithmetic number, because the mean of its divisors is an integer number (172028).

2⁵¹⁶⁰⁸¹ is an apocalyptic number.

It is an amenable number.

516081 is a deficient number, since it is larger than the sum of its proper divisors (172031).

516081 is a wasteful number, since it uses less digits than its factorization.

516081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172030.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 516081 is about 718.3877782925. The cubic root of 516081 is about 80.2119898410.

Adding to 516081 its reverse (180615), we get a palindrome (696696).

The spelling of 516081 in words is "five hundred sixteen thousand, eighty-one".