631144543 has 2 divisors, whose sum is σ = 631144544. Its totient is φ = 631144542.

The previous prime is 631144523. The next prime is 631144589. The reversal of 631144543 is 345441136.

It is a happy number.

631144543 is digitally balanced in base 2, 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 631144543 - 2²⁹ = 94273631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631144523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315572271 + 315572272.

It is an arithmetic number, because the mean of its divisors is an integer number (315572272).

Almost surely, 2^631144543 is an apocalyptic number.

631144543 is a deficient number, since it is larger than the sum of its proper divisors (1).

631144543 is an equidigital number, since it uses as much as digits as its factorization.

631144543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 631144543 is about 25122.5902924042. The cubic root of 631144543 is about 857.7807133716.

Adding to 631144543 its reverse (345441136), we get a palindrome (976585679).

The spelling of 631144543 in words is "six hundred thirty-one million, one hundred forty-four thousand, five hundred forty-three".