130631256 has 144 divisors (see below), whose sum is σ = 418991040. Its totient is φ = 36650880.

The previous prime is 130631243. The next prime is 130631269. The reversal of 130631256 is 652136031.

130631256 is a `hidden beast` number, since 1 + 3 + 0 + 631 + 25 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (130631243) and next prime (130631269).

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 214905 + ... + 215511.

It is an arithmetic number, because the mean of its divisors is an integer number (2909660).

Almost surely, 2^130631256 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 130631256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209495520).

130631256 is an abundant number, since it is smaller than the sum of its proper divisors (288359784).

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

130631256 is a wasteful number, since it uses less digits than its factorization.

130631256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 130631256 is about 11429.4031340224. The cubic root of 130631256 is about 507.3983308029.

Adding to 130631256 its reverse (652136031), we get a palindrome (782767287).

The spelling of 130631256 in words is "one hundred thirty million, six hundred thirty-one thousand, two hundred fifty-six".