221615130 has 48 divisors (see below), whose sum is σ = 584633952. Its totient is φ = 53724000.

The previous prime is 221615123. The next prime is 221615131. The reversal of 221615130 is 31516122.

It is a super-2 number, since 2×221615130² = 98226531689833800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221615097 and 221615106.

It is not an unprimeable number, because it can be changed into a prime (221615131) 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 23 ways as a sum of consecutive naturals, for example, 26896 + ... + 34155.

It is an arithmetic number, because the mean of its divisors is an integer number (12179874).

Almost surely, 2^221615130 is an apocalyptic number.

221615130 is an abundant number, since it is smaller than the sum of its proper divisors (363018822).

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

221615130 is a wasteful number, since it uses less digits than its factorization.

221615130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61083 (or 61072 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 221615130 is about 14886.7434316576. The cubic root of 221615130 is about 605.1547813345.

The spelling of 221615130 in words is "two hundred twenty-one million, six hundred fifteen thousand, one hundred thirty".