221140441 has 4 divisors (see below), whose sum is σ = 221189584. Its totient is φ = 221091300.

The previous prime is 221140427. The next prime is 221140459. The reversal of 221140441 is 144041122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221140441 - 2⁷ = 221140313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221140421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17055 + ... + 27076.

It is an arithmetic number, because the mean of its divisors is an integer number (55297396).

Almost surely, 2^221140441 is an apocalyptic number.

It is an amenable number.

221140441 is a deficient number, since it is larger than the sum of its proper divisors (49143).

221140441 is an equidigital number, since it uses as much as digits as its factorization.

221140441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49142.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 221140441 is about 14870.7915391212. The cubic root of 221140441 is about 604.7224016173.

Adding to 221140441 its reverse (144041122), we get a palindrome (365181563).

The spelling of 221140441 in words is "two hundred twenty-one million, one hundred forty thousand, four hundred forty-one".