631503144 has 96 divisors (see below), whose sum is σ = 1748396520. Its totient is φ = 205867008.

The previous prime is 631503113. The next prime is 631503253. The reversal of 631503144 is 441305136.

631503144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 621504900 + 9998244 = 24930^2 + 3162^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 719634 + ... + 720510.

Almost surely, 2^631503144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631503144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874198260).

631503144 is an abundant number, since it is smaller than the sum of its proper divisors (1116893376).

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

631503144 is a wasteful number, since it uses less digits than its factorization.

631503144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 631503144 is about 25129.7263017328. The cubic root of 631503144 is about 857.9431393358.

The spelling of 631503144 in words is "six hundred thirty-one million, five hundred three thousand, one hundred forty-four".