130631656 has 8 divisors (see below), whose sum is σ = 244934370. Its totient is φ = 65315824.

The previous prime is 130631629. The next prime is 130631663. The reversal of 130631656 is 656136031.

130631656 is digitally balanced in base 3, 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 only one way, i.e., 130188100 + 443556 = 11410^2 + 666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8164471 + ... + 8164486.

Almost surely, 2^130631656 is an apocalyptic number.

It is an amenable number.

130631656 is a deficient number, since it is larger than the sum of its proper divisors (114302714).

130631656 is a wasteful number, since it uses less digits than its factorization.

130631656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16328963 (or 16328959 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 130631656 is about 11429.4206327355. The cubic root of 130631656 is about 507.3988486961.

Adding to 130631656 its reverse (656136031), we get a palindrome (786767687).

The spelling of 130631656 in words is "one hundred thirty million, six hundred thirty-one thousand, six hundred fifty-six".