221145411 has 16 divisors (see below), whose sum is σ = 306675200. Its totient is φ = 141624288.

The previous prime is 221145377. The next prime is 221145439. The reversal of 221145411 is 114541122.

221145411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221145411 - 2⁶ = 221145347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221145451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3841 + ... + 21378.

It is an arithmetic number, because the mean of its divisors is an integer number (19167200).

Almost surely, 2^221145411 is an apocalyptic number.

221145411 is a deficient number, since it is larger than the sum of its proper divisors (85529789).

221145411 is a wasteful number, since it uses less digits than its factorization.

221145411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25338.

The product of its digits is 320, while the sum is 21.

The square root of 221145411 is about 14870.9586442838. The cubic root of 221145411 is about 604.7269318422.

Adding to 221145411 its reverse (114541122), we get a palindrome (335686533).

The spelling of 221145411 in words is "two hundred twenty-one million, one hundred forty-five thousand, four hundred eleven".