631540450 has 12 divisors (see below), whose sum is σ = 1174665330. Its totient is φ = 252616160.

The previous prime is 631540423. The next prime is 631540451. The reversal of 631540450 is 54045136.

It can be written as a sum of positive squares in 3 ways, for example, as 436016161 + 195524289 = 20881^2 + 13983^2 .

It is not an unprimeable number, because it can be changed into a prime (631540451) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6315355 + ... + 6315454.

Almost surely, 2^631540450 is an apocalyptic number.

631540450 is a deficient number, since it is larger than the sum of its proper divisors (543124880).

631540450 is a wasteful number, since it uses less digits than its factorization.

631540450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12630821 (or 12630816 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 631540450 is about 25130.4685591017. The cubic root of 631540450 is about 857.9600333117.

Adding to 631540450 its reverse (54045136), we get a palindrome (685585586).

The spelling of 631540450 in words is "six hundred thirty-one million, five hundred forty thousand, four hundred fifty".