631324543 has 2 divisors, whose sum is σ = 631324544. Its totient is φ = 631324542.

The previous prime is 631324541. The next prime is 631324553. The reversal of 631324543 is 345423136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631324543 - 2¹ = 631324541 is a prime.

Together with 631324541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631324541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315662271 + 315662272.

It is an arithmetic number, because the mean of its divisors is an integer number (315662272).

Almost surely, 2^631324543 is an apocalyptic number.

631324543 is a deficient number, since it is larger than the sum of its proper divisors (1).

631324543 is an equidigital number, since it uses as much as digits as its factorization.

631324543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 31.

The square root of 631324543 is about 25126.1724701555. The cubic root of 631324543 is about 857.8622508759.

Adding to 631324543 its reverse (345423136), we get a palindrome (976747679).

The spelling of 631324543 in words is "six hundred thirty-one million, three hundred twenty-four thousand, five hundred forty-three".