5231531 has 2 divisors, whose sum is σ = 5231532. Its totient is φ = 5231530.

The previous prime is 5231521. The next prime is 5231533. The reversal of 5231531 is 1351325.

5231531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5231531 is a prime.

It is a super-2 number, since 2×5231531² = 54737833207922, which contains 22 as substring.

Together with 5231533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5231533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2615765 + 2615766.

It is an arithmetic number, because the mean of its divisors is an integer number (2615766).

Almost surely, 2^5231531 is an apocalyptic number.

5231531 is a deficient number, since it is larger than the sum of its proper divisors (1).

5231531 is an equidigital number, since it uses as much as digits as its factorization.

5231531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 20.

The square root of 5231531 is about 2287.2540304916. The cubic root of 5231531 is about 173.5972872752.

Adding to 5231531 its reverse (1351325), we get a palindrome (6582856).

The spelling of 5231531 in words is "five million, two hundred thirty-one thousand, five hundred thirty-one".