130820520 has 64 divisors (see below), whose sum is σ = 393376320. Its totient is φ = 34804224.

The previous prime is 130820519. The next prime is 130820561. The reversal of 130820520 is 25028031.

It is a super-2 number, since 2×130820520² = 34228016906140800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 64644 + ... + 66636.

It is an arithmetic number, because the mean of its divisors is an integer number (6146505).

Almost surely, 2^130820520 is an apocalyptic number.

130820520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130820520 is an abundant number, since it is smaller than the sum of its proper divisors (262555800).

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

130820520 is a wasteful number, since it uses less digits than its factorization.

130820520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554 (or 2550 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 130820520 is about 11437.6798346518. The cubic root of 130820520 is about 507.6432591593.

Adding to 130820520 its reverse (25028031), we get a palindrome (155848551).

The spelling of 130820520 in words is "one hundred thirty million, eight hundred twenty thousand, five hundred twenty".