221104245 has 32 divisors (see below), whose sum is σ = 366879744. Its totient is φ = 113587200.

The previous prime is 221104243. The next prime is 221104249. The reversal of 221104245 is 542401122.

It is not a de Polignac number, because 221104245 - 2¹ = 221104243 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221104243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111079 + ... + 113051.

It is an arithmetic number, because the mean of its divisors is an integer number (11464992).

Almost surely, 2^221104245 is an apocalyptic number.

It is an amenable number.

221104245 is a deficient number, since it is larger than the sum of its proper divisors (145775499).

221104245 is a wasteful number, since it uses less digits than its factorization.

221104245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 221104245 is about 14869.5744727279. The cubic root of 221104245 is about 604.6894064065.

Adding to 221104245 its reverse (542401122), we get a palindrome (763505367).

The spelling of 221104245 in words is "two hundred twenty-one million, one hundred four thousand, two hundred forty-five".