631313881250 has 48 divisors (see below), whose sum is σ = 1274686992936. Its totient is φ = 233100480000.

The previous prime is 631313881213. The next prime is 631313881259. The reversal of 631313881250 is 52188313136.

It can be written as a sum of positive squares in 12 ways, for example, as 249559194481 + 381754686769 = 499559^2 + 617863^2 .

It is a junction number, because it is equal to n+sod(n) for n = 631313881198 and 631313881207.

It is not an unprimeable number, because it can be changed into a prime (631313881259) 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, 3803759 + ... + 3966258.

Almost surely, 2^631313881250 is an apocalyptic number.

631313881250 is an abundant number, since it is smaller than the sum of its proper divisors (643373111686).

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

631313881250 is an equidigital number, since it uses as much as digits as its factorization.

631313881250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7770057 (or 7770037 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 631313881250 in words is "six hundred thirty-one billion, three hundred thirteen million, eight hundred eighty-one thousand, two hundred fifty".