5131231 has 24 divisors (see below), whose sum is σ = 6484320. Its totient is φ = 4036032.

The previous prime is 5131223. The next prime is 5131237. The reversal of 5131231 is 1321315.

5131231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5131231 - 2³ = 5131223 is a prime.

It is a super-2 number, since 2×5131231² = 52659063150722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5131237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32605 + ... + 32761.

It is an arithmetic number, because the mean of its divisors is an integer number (270180).

Almost surely, 2^5131231 is an apocalyptic number.

5131231 is a deficient number, since it is larger than the sum of its proper divisors (1353089).

5131231 is a wasteful number, since it uses less digits than its factorization.

5131231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 216 counting only the distinct ones).

The product of its digits is 90, while the sum is 16.

The square root of 5131231 is about 2265.2220641694. Note that the first 3 decimals coincide. The cubic root of 5131231 is about 172.4807063768.

Adding to 5131231 its reverse (1321315), we get a palindrome (6452546).

The spelling of 5131231 in words is "five million, one hundred thirty-one thousand, two hundred thirty-one".