631643332 has 12 divisors (see below), whose sum is σ = 1115158716. Its totient is φ = 313026560.

The previous prime is 631643329. The next prime is 631643357. The reversal of 631643332 is 233346136.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 319908996 + 311734336 = 17886^2 + 17656^2 .

It is a junction number, because it is equal to n+sod(n) for n = 631643294 and 631643303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698269 + ... + 699172.

It is an arithmetic number, because the mean of its divisors is an integer number (92929893).

Almost surely, 2^631643332 is an apocalyptic number.

It is an amenable number.

631643332 is a deficient number, since it is larger than the sum of its proper divisors (483515384).

631643332 is a wasteful number, since it uses less digits than its factorization.

631643332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397558 (or 1397556 counting only the distinct ones).

The product of its digits is 23328, while the sum is 31.

The square root of 631643332 is about 25132.5154331993. The cubic root of 631643332 is about 858.0066198506.

Adding to 631643332 its reverse (233346136), we get a palindrome (864989468).

The spelling of 631643332 in words is "six hundred thirty-one million, six hundred forty-three thousand, three hundred thirty-two".