5642531231 has 2 divisors, whose sum is σ = 5642531232. Its totient is φ = 5642531230.

The previous prime is 5642531221. The next prime is 5642531243. The reversal of 5642531231 is 1321352465.

It is a happy number.

5642531231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5642531231 - 2¹⁴ = 5642514847 is a prime.

It is a super-2 number, since 2×5642531231² = 63676317385620750722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5642531221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2821265615 + 2821265616.

It is an arithmetic number, because the mean of its divisors is an integer number (2821265616).

Almost surely, 2^5642531231 is an apocalyptic number.

5642531231 is a deficient number, since it is larger than the sum of its proper divisors (1).

5642531231 is an equidigital number, since it uses as much as digits as its factorization.

5642531231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 32.

The square root of 5642531231 is about 75116.7839500601. The cubic root of 5642531231 is about 1780.2923425700.

Adding to 5642531231 its reverse (1321352465), we get a palindrome (6963883696).

The spelling of 5642531231 in words is "five billion, six hundred forty-two million, five hundred thirty-one thousand, two hundred thirty-one".