516510161 has 4 divisors (see below), whose sum is σ = 523785024. Its totient is φ = 509235300.

The previous prime is 516510157. The next prime is 516510179. The reversal of 516510161 is 161015615.

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, and also an emirpimes, since its reverse is a distinct semiprime: 161015615 = 5 ⋅32203123.

It is a cyclic number.

It is not a de Polignac number, because 516510161 - 2² = 516510157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 516510161.

It is not an unprimeable number, because it can be changed into a prime (516515161) 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, 3637325 + ... + 3637466.

It is an arithmetic number, because the mean of its divisors is an integer number (130946256).

Almost surely, 2^516510161 is an apocalyptic number.

It is an amenable number.

516510161 is a deficient number, since it is larger than the sum of its proper divisors (7274863).

516510161 is an equidigital number, since it uses as much as digits as its factorization.

516510161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7274862.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 516510161 is about 22726.8599018870. The cubic root of 516510161 is about 802.3421782468.

Adding to 516510161 its reverse (161015615), we get a palindrome (677525776).

The spelling of 516510161 in words is "five hundred sixteen million, five hundred ten thousand, one hundred sixty-one".