221041024 has 16 divisors (see below), whose sum is σ = 440355420. Its totient is φ = 110520448.

The previous prime is 221041019. The next prime is 221041031. The reversal of 221041024 is 420140122.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 221040989 and 221041007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 863314 + ... + 863569.

Almost surely, 2^221041024 is an apocalyptic number.

It is an amenable number.

221041024 is a deficient number, since it is larger than the sum of its proper divisors (219314396).

221041024 is an equidigital number, since it uses as much as digits as its factorization.

221041024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726897 (or 1726885 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221041024 is about 14867.4484697274. The cubic root of 221041024 is about 604.6317673606.

Adding to 221041024 its reverse (420140122), we get a palindrome (641181146).

It can be divided in two parts, 2210 and 41024, that added together give a palindrome (43234).

The spelling of 221041024 in words is "two hundred twenty-one million, forty-one thousand, twenty-four".