221443023 has 8 divisors (see below), whose sum is σ = 296657536. Its totient is φ = 146928600.

The previous prime is 221443007. The next prime is 221443051. The reversal of 221443023 is 320344122.

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

It is not a de Polignac number, because 221443023 - 2⁴ = 221443007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221443073) 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, 174283 + ... + 175548.

It is an arithmetic number, because the mean of its divisors is an integer number (37082192).

Almost surely, 2^221443023 is an apocalyptic number.

221443023 is a deficient number, since it is larger than the sum of its proper divisors (75214513).

221443023 is a wasteful number, since it uses less digits than its factorization.

221443023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350045.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 221443023 is about 14880.9617632732. The cubic root of 221443023 is about 604.9980857349.

Adding to 221443023 its reverse (320344122), we get a palindrome (541787145).

The spelling of 221443023 in words is "two hundred twenty-one million, four hundred forty-three thousand, twenty-three".