221144361 has 8 divisors (see below), whose sum is σ = 294985440. Its totient is φ = 147366432.

The previous prime is 221144321. The next prime is 221144369. The reversal of 221144361 is 163441122.

221144361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221144361 - 2¹³ = 221136169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221144369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6900 + ... + 22133.

It is an arithmetic number, because the mean of its divisors is an integer number (36873180).

Almost surely, 2^221144361 is an apocalyptic number.

It is an amenable number.

221144361 is a deficient number, since it is larger than the sum of its proper divisors (73841079).

221144361 is a wasteful number, since it uses less digits than its factorization.

221144361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31575.

The product of its digits is 1152, while the sum is 24.

The square root of 221144361 is about 14870.9233405327. The cubic root of 221144361 is about 604.7259747581.

Adding to 221144361 its reverse (163441122), we get a palindrome (384585483).

The spelling of 221144361 in words is "two hundred twenty-one million, one hundred forty-four thousand, three hundred sixty-one".