221441023 has 4 divisors (see below), whose sum is σ = 221475280. Its totient is φ = 221406768.

The previous prime is 221440981. The next prime is 221441053. The reversal of 221441023 is 320144122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320144122 = 2 ⋅160072061.

It is a cyclic number.

It is not a de Polignac number, because 221441023 - 2²⁵ = 187886591 is a prime.

It is a super-2 number, since 2×221441023² = 98072253334573058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221441053) 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, 4158 + ... + 21451.

It is an arithmetic number, because the mean of its divisors is an integer number (55368820).

Almost surely, 2^221441023 is an apocalyptic number.

221441023 is a deficient number, since it is larger than the sum of its proper divisors (34257).

221441023 is an equidigital number, since it uses as much as digits as its factorization.

221441023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34256.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221441023 is about 14880.8945631639. The cubic root of 221441023 is about 604.9962643487.

Adding to 221441023 its reverse (320144122), we get a palindrome (541585145).

The spelling of 221441023 in words is "two hundred twenty-one million, four hundred forty-one thousand, twenty-three".