5078431081 has 4 divisors (see below), whose sum is σ = 5079109252. Its totient is φ = 5077752912.

The previous prime is 5078431051. The next prime is 5078431103. The reversal of 5078431081 is 1801348705.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3759651856 + 1318779225 = 61316^2 + 36315^2 .

It is a cyclic number.

It is not a de Polignac number, because 5078431081 - 2⁵ = 5078431049 is a prime.

It is a super-2 number, since 2×5078431081² = 51580924488933657122, which contains 22 as substring.

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 5078431081.

It is not an unprimeable number, because it can be changed into a prime (5078431051) 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, 327726 + ... + 342871.

It is an arithmetic number, because the mean of its divisors is an integer number (1269777313).

Almost surely, 2^5078431081 is an apocalyptic number.

It is an amenable number.

5078431081 is a deficient number, since it is larger than the sum of its proper divisors (678171).

5078431081 is an equidigital number, since it uses as much as digits as its factorization.

5078431081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678170.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 5078431081 is about 71263.1116427005. Note that the first 3 decimals coincide. The cubic root of 5078431081 is about 1718.8706170938.

Adding to 5078431081 its reverse (1801348705), we get a palindrome (6879779786).

The spelling of 5078431081 in words is "five billion, seventy-eight million, four hundred thirty-one thousand, eighty-one".