5128131 has 4 divisors (see below), whose sum is σ = 6837512. Its totient is φ = 3418752.

The previous prime is 5128063. The next prime is 5128153. The reversal of 5128131 is 1318215.

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

It is not a de Polignac number, because 5128131 - 2¹⁰ = 5127107 is a prime.

It is a super-2 number, since 2×5128131² = 52595455106322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5128098 and 5128107.

It is not an unprimeable number, because it can be changed into a prime (5128231) 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, 854686 + ... + 854691.

It is an arithmetic number, because the mean of its divisors is an integer number (1709378).

Almost surely, 2^5128131 is an apocalyptic number.

5128131 is a deficient number, since it is larger than the sum of its proper divisors (1709381).

5128131 is a wasteful number, since it uses less digits than its factorization.

5128131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709380.

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

The square root of 5128131 is about 2264.5377011655. The cubic root of 5128131 is about 172.4459650121.

It can be divided in two parts, 51 and 28131, that added together give a palindrome (28182).

The spelling of 5128131 in words is "five million, one hundred twenty-eight thousand, one hundred thirty-one".