631505630 has 96 divisors (see below), whose sum is σ = 1430752896. Its totient is φ = 199320576.

The previous prime is 631505629. The next prime is 631505639. The reversal of 631505630 is 36505136.

It is a junction number, because it is equal to n+sod(n) for n = 631505593 and 631505602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631505639) 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 47 ways as a sum of consecutive naturals, for example, 390704 + ... + 392316.

It is an arithmetic number, because the mean of its divisors is an integer number (14903676).

Almost surely, 2^631505630 is an apocalyptic number.

631505630 is an abundant number, since it is smaller than the sum of its proper divisors (799247266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631505630 is a wasteful number, since it uses less digits than its factorization.

631505630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698 (or 1691 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 631505630 is about 25129.7757650163. The cubic root of 631505630 is about 857.9442651385.

The spelling of 631505630 in words is "six hundred thirty-one million, five hundred five thousand, six hundred thirty".