221441145 has 8 divisors (see below), whose sum is σ = 354305856. Its totient is φ = 118101936.

The previous prime is 221441141. The next prime is 221441147. The reversal of 221441145 is 541144122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221441145 - 2² = 221441141 is a prime.

It is a super-2 number, since 2×221441145² = 98072361397822050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221441141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7381357 + ... + 7381386.

It is an arithmetic number, because the mean of its divisors is an integer number (44288232).

Almost surely, 2^221441145 is an apocalyptic number.

It is an amenable number.

221441145 is a deficient number, since it is larger than the sum of its proper divisors (132864711).

221441145 is a wasteful number, since it uses less digits than its factorization.

221441145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14762751.

The product of its digits is 1280, while the sum is 24.

The square root of 221441145 is about 14880.8986623792. The cubic root of 221441145 is about 604.9963754535.

Adding to 221441145 its reverse (541144122), we get a palindrome (762585267).

The spelling of 221441145 in words is "two hundred twenty-one million, four hundred forty-one thousand, one hundred forty-five".