631642130 has 32 divisors (see below), whose sum is σ = 1315837440. Its totient is φ = 213819840.

The previous prime is 631642117. The next prime is 631642147. The reversal of 631642130 is 31246136.

It is a self number, because there is not a number n which added to its sum of digits gives 631642130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51581 + ... + 62640.

It is an arithmetic number, because the mean of its divisors is an integer number (41119920).

Almost surely, 2^631642130 is an apocalyptic number.

631642130 is an abundant number, since it is smaller than the sum of its proper divisors (684195310).

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

631642130 is a wasteful number, since it uses less digits than its factorization.

631642130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114314.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 631642130 is about 25132.4915199429. The cubic root of 631642130 is about 858.0060755959.

Adding to 631642130 its reverse (31246136), we get a palindrome (662888266).

The spelling of 631642130 in words is "six hundred thirty-one million, six hundred forty-two thousand, one hundred thirty".