130205812 has 24 divisors (see below), whose sum is σ = 255296160. Its totient is φ = 57584160.

The previous prime is 130205773. The next prime is 130205819. The reversal of 130205812 is 218502031.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130205819) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38362 + ... + 41617.

It is an arithmetic number, because the mean of its divisors is an integer number (10637340).

Almost surely, 2^130205812 is an apocalyptic number.

It is an amenable number.

130205812 is a deficient number, since it is larger than the sum of its proper divisors (125090348).

130205812 is a wasteful number, since it uses less digits than its factorization.

130205812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80031 (or 80029 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 130205812 is about 11410.7761348648. The cubic root of 130205812 is about 506.8468947548.

Adding to 130205812 its reverse (218502031), we get a palindrome (348707843).

The spelling of 130205812 in words is "one hundred thirty million, two hundred five thousand, eight hundred twelve".