130618521 has 64 divisors (see below), whose sum is σ = 225792000. Its totient is φ = 73794240.

The previous prime is 130618517. The next prime is 130618529. The reversal of 130618521 is 125816031.

130618521 is a `hidden beast` number, since 130 + 6 + 1 + 8 + 521 = 666.

It is not a de Polignac number, because 130618521 - 2² = 130618517 is a prime.

It is a super-2 number, since 2×130618521² = 34122396056454882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (130618529) 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 63 ways as a sum of consecutive naturals, for example, 445651 + ... + 445943.

It is an arithmetic number, because the mean of its divisors is an integer number (3528000).

Almost surely, 2^130618521 is an apocalyptic number.

130618521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

130618521 is a deficient number, since it is larger than the sum of its proper divisors (95173479).

130618521 is a wasteful number, since it uses less digits than its factorization.

130618521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 130618521 is about 11428.8460047373. The cubic root of 130618521 is about 507.3818418248.

The spelling of 130618521 in words is "one hundred thirty million, six hundred eighteen thousand, five hundred twenty-one".