130731820 has 12 divisors (see below), whose sum is σ = 274536864. Its totient is φ = 52292720.

The previous prime is 130731817. The next prime is 130731857. The reversal of 130731820 is 28137031.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3268276 + ... + 3268315.

It is an arithmetic number, because the mean of its divisors is an integer number (22878072).

Almost surely, 2^130731820 is an apocalyptic number.

130731820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130731820 is an abundant number, since it is smaller than the sum of its proper divisors (143805044).

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

130731820 is a wasteful number, since it uses less digits than its factorization.

130731820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536600 (or 6536598 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 130731820 is about 11433.8016424984. The cubic root of 130731820 is about 507.5285010727.

Adding to 130731820 its reverse (28137031), we get a palindrome (158868851).

The spelling of 130731820 in words is "one hundred thirty million, seven hundred thirty-one thousand, eight hundred twenty".