130505221 has 16 divisors (see below), whose sum is σ = 163163520. Its totient is φ = 101407680.

The previous prime is 130505201. The next prime is 130505267. The reversal of 130505221 is 122505031.

It is not a de Polignac number, because 130505221 - 2²¹ = 128408069 is a prime.

It is a super-2 number, since 2×130505221² = 34063225416517682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130505201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27775 + ... + 32131.

It is an arithmetic number, because the mean of its divisors is an integer number (10197720).

Almost surely, 2^130505221 is an apocalyptic number.

130505221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

130505221 is a deficient number, since it is larger than the sum of its proper divisors (32658299).

130505221 is a wasteful number, since it uses less digits than its factorization.

130505221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 130505221 is about 11423.8881734723. Note that the first 3 decimals coincide. The cubic root of 130505221 is about 507.2350964483.

The spelling of 130505221 in words is "one hundred thirty million, five hundred five thousand, two hundred twenty-one".