221026443 has 8 divisors (see below), whose sum is σ = 321493056. Its totient is φ = 133955400.

The previous prime is 221026441. The next prime is 221026453. The reversal of 221026443 is 344620122.

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

It is not a de Polignac number, because 221026443 - 2¹ = 221026441 is a prime.

It is a super-4 number, since 4×221026443⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (221026441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3348853 + ... + 3348918.

It is an arithmetic number, because the mean of its divisors is an integer number (40186632).

Almost surely, 2^221026443 is an apocalyptic number.

221026443 is a deficient number, since it is larger than the sum of its proper divisors (100466613).

221026443 is a wasteful number, since it uses less digits than its factorization.

221026443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6697785.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 221026443 is about 14866.9580950509. The cubic root of 221026443 is about 604.6184721971.

Adding to 221026443 its reverse (344620122), we get a palindrome (565646565).

The spelling of 221026443 in words is "two hundred twenty-one million, twenty-six thousand, four hundred forty-three".