516147881 has 4 divisors (see below), whose sum is σ = 516904272. Its totient is φ = 515391492.

The previous prime is 516147869. The next prime is 516147883. The reversal of 516147881 is 188741615.

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: 188741615 = 5 ⋅37748323.

It is a cyclic number.

It is not a de Polignac number, because 516147881 - 2¹⁰ = 516146857 is a prime.

It is a super-2 number, since 2×516147881² = 532817270121580322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (516147883) 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, 377171 + ... + 378536.

It is an arithmetic number, because the mean of its divisors is an integer number (129226068).

Almost surely, 2^516147881 is an apocalyptic number.

It is an amenable number.

516147881 is a deficient number, since it is larger than the sum of its proper divisors (756391).

516147881 is an equidigital number, since it uses as much as digits as its factorization.

516147881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756390.

The product of its digits is 53760, while the sum is 41.

The square root of 516147881 is about 22718.8881990295. Note that the first 3 decimals coincide. The cubic root of 516147881 is about 802.1545468880.

It can be divided in two parts, 51614 and 7881, that added together give a palindrome (59495).

The spelling of 516147881 in words is "five hundred sixteen million, one hundred forty-seven thousand, eight hundred eighty-one".