221034445 has 4 divisors (see below), whose sum is σ = 265241340. Its totient is φ = 176827552.

The previous prime is 221034419. The next prime is 221034449. The reversal of 221034445 is 544430122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88623396 + 132411049 = 9414^2 + 11507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221034445 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221034449) 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 3 ways as a sum of consecutive naturals, for example, 22103440 + ... + 22103449.

It is an arithmetic number, because the mean of its divisors is an integer number (66310335).

Almost surely, 2^221034445 is an apocalyptic number.

It is an amenable number.

221034445 is a deficient number, since it is larger than the sum of its proper divisors (44206895).

221034445 is an equidigital number, since it uses as much as digits as its factorization.

221034445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44206894.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 221034445 is about 14867.2272129002. The cubic root of 221034445 is about 604.6257686071.

Adding to 221034445 its reverse (544430122), we get a palindrome (765464567).

The spelling of 221034445 in words is "two hundred twenty-one million, thirty-four thousand, four hundred forty-five".