221044042 has 8 divisors (see below), whose sum is σ = 332402436. Its totient is φ = 110243232.

The previous prime is 221044027. The next prime is 221044051. The reversal of 221044042 is 240440122.

It can be written as a sum of positive squares in 2 ways, for example, as 218123361 + 2920681 = 14769^2 + 1709^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138403 + ... + 139990.

Almost surely, 2^221044042 is an apocalyptic number.

221044042 is a deficient number, since it is larger than the sum of its proper divisors (111358394).

221044042 is a wasteful number, since it uses less digits than its factorization.

221044042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278792.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 221044042 is about 14867.5499662856. The cubic root of 221044042 is about 604.6345191430.

Adding to 221044042 its reverse (240440122), we get a palindrome (461484164).

The spelling of 221044042 in words is "two hundred twenty-one million, forty-four thousand, forty-two".