631631450 has 12 divisors (see below), whose sum is σ = 1174834590. Its totient is φ = 252652560.

The previous prime is 631631437. The next prime is 631631491. The reversal of 631631450 is 54136136.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 399160441 + 232471009 = 19979^2 + 15247^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6316265 + ... + 6316364.

Almost surely, 2^631631450 is an apocalyptic number.

631631450 is a deficient number, since it is larger than the sum of its proper divisors (543203140).

631631450 is a wasteful number, since it uses less digits than its factorization.

631631450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12632641 (or 12632636 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 631631450 is about 25132.2790450846. The cubic root of 631631450 is about 858.0012397582.

Adding to 631631450 its reverse (54136136), we get a palindrome (685767586).

The spelling of 631631450 in words is "six hundred thirty-one million, six hundred thirty-one thousand, four hundred fifty".