631542213441 has 24 divisors (see below), whose sum is σ = 919416045600. Its totient is φ = 417719379456.

The previous prime is 631542213413. The next prime is 631542213479. The reversal of 631542213441 is 144312245136.

631542213441 is a `hidden beast` number, since 63 + 1 + 5 + 422 + 134 + 41 = 666.

It is not a de Polignac number, because 631542213441 - 2¹⁰ = 631542212417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631542213396 and 631542213405.

It is not an unprimeable number, because it can be changed into a prime (631542213481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 473410 + ... + 1219508.

It is an arithmetic number, because the mean of its divisors is an integer number (38309001900).

Almost surely, 2^631542213441 is an apocalyptic number.

It is an amenable number.

631542213441 is a deficient number, since it is larger than the sum of its proper divisors (287873832159).

631542213441 is a wasteful number, since it uses less digits than its factorization.

631542213441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746845 (or 746842 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 631542213441 its reverse (144312245136), we get a palindrome (775854458577).

The spelling of 631542213441 in words is "six hundred thirty-one billion, five hundred forty-two million, two hundred thirteen thousand, four hundred forty-one".