221441423 has 8 divisors (see below), whose sum is σ = 253710240. Its totient is φ = 189331200.

The previous prime is 221441413. The next prime is 221441431. The reversal of 221441423 is 324144122.

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

It is a cyclic number.

It is not a de Polignac number, because 221441423 - 2²⁰ = 220392847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221441413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36638 + ... + 42251.

It is an arithmetic number, because the mean of its divisors is an integer number (31713780).

Almost surely, 2^221441423 is an apocalyptic number.

221441423 is a deficient number, since it is larger than the sum of its proper divisors (32268817).

221441423 is an equidigital number, since it uses as much as digits as its factorization.

221441423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79297.

The product of its digits is 1536, while the sum is 23.

The square root of 221441423 is about 14880.9080032100. The cubic root of 221441423 is about 604.9966286268.

Adding to 221441423 its reverse (324144122), we get a palindrome (545585545).

The spelling of 221441423 in words is "two hundred twenty-one million, four hundred forty-one thousand, four hundred twenty-three".