631500130 has 16 divisors (see below), whose sum is σ = 1144999800. Its totient is φ = 250755712.

The previous prime is 631500119. The next prime is 631500137. The reversal of 631500130 is 31005136.

It can be written as a sum of positive squares in 4 ways, for example, as 375468129 + 256032001 = 19377^2 + 16001^2 .

It is a junction number, because it is equal to n+sod(n) for n = 631500098 and 631500107.

It is not an unprimeable number, because it can be changed into a prime (631500137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229105 + ... + 231844.

Almost surely, 2^631500130 is an apocalyptic number.

631500130 is a deficient number, since it is larger than the sum of its proper divisors (513499670).

631500130 is a wasteful number, since it uses less digits than its factorization.

631500130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461093.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 631500130 is about 25129.6663328425. Note that the first 3 decimals coincide. The cubic root of 631500130 is about 857.9417744206.

Adding to 631500130 its reverse (31005136), we get a palindrome (662505266).

The spelling of 631500130 in words is "six hundred thirty-one million, five hundred thousand, one hundred thirty".