631431552123 has 24 divisors (see below), whose sum is σ = 929431526400. Its totient is φ = 412969647024.

The previous prime is 631431552049. The next prime is 631431552133. The reversal of 631431552123 is 321255134136.

631431552123 is a `hidden beast` number, since 6 + 3 + 1 + 431 + 5 + 5 + 212 + 3 = 666.

It is not a de Polignac number, because 631431552123 - 2⁸ = 631431551867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631431552133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 962283 + ... + 1479476.

It is an arithmetic number, because the mean of its divisors is an integer number (38726313600).

Almost surely, 2^631431552123 is an apocalyptic number.

631431552123 is a deficient number, since it is larger than the sum of its proper divisors (297999974277).

631431552123 is a wasteful number, since it uses less digits than its factorization.

631431552123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442311 (or 2442308 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

Adding to 631431552123 its reverse (321255134136), we get a palindrome (952686686259).

The spelling of 631431552123 in words is "six hundred thirty-one billion, four hundred thirty-one million, five hundred fifty-two thousand, one hundred twenty-three".