221041256 has 32 divisors (see below), whose sum is σ = 426816000. Its totient is φ = 107240256.

The previous prime is 221041237. The next prime is 221041267. The reversal of 221041256 is 652140122.

It is a happy number.

It is an unprimeable number.

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, 141005 + ... + 142563.

It is an arithmetic number, because the mean of its divisors is an integer number (13338000).

Almost surely, 2^221041256 is an apocalyptic number.

It is an amenable number.

221041256 is a deficient number, since it is larger than the sum of its proper divisors (205774744).

221041256 is a wasteful number, since it uses less digits than its factorization.

221041256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081 (or 2077 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 221041256 is about 14867.4562720056. The cubic root of 221041256 is about 604.6319788968.

Adding to 221041256 its reverse (652140122), we get a palindrome (873181378).

The spelling of 221041256 in words is "two hundred twenty-one million, forty-one thousand, two hundred fifty-six".