221241330 has 48 divisors (see below), whose sum is σ = 589267224. Its totient is φ = 57557760.

The previous prime is 221241313. The next prime is 221241331. The reversal of 221241330 is 33142122.

221241330 is a `hidden beast` number, since 221 + 2 + 413 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 94070601 + 127170729 = 9699^2 + 11277^2 .

It is a super-2 number, since 2×221241330² = 97895452200337800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221241331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26289 + ... + 33668.

Almost surely, 2^221241330 is an apocalyptic number.

221241330 is an abundant number, since it is smaller than the sum of its proper divisors (368025894).

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

221241330 is a wasteful number, since it uses less digits than its factorization.

221241330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60011 (or 60008 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 221241330 is about 14874.1833389265. The cubic root of 221241330 is about 604.8143500679.

Adding to 221241330 its reverse (33142122), we get a palindrome (254383452).

The spelling of 221241330 in words is "two hundred twenty-one million, two hundred forty-one thousand, three hundred thirty".