144302221 has 8 divisors (see below), whose sum is σ = 165161024. Its totient is φ = 123504480.

The previous prime is 144302203. The next prime is 144302227. The reversal of 144302221 is 122203441.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144302221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144302227) 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, 10080 + ... + 19753.

It is an arithmetic number, because the mean of its divisors is an integer number (20645128).

Almost surely, 2^144302221 is an apocalyptic number.

It is an amenable number.

144302221 is a deficient number, since it is larger than the sum of its proper divisors (20858803).

144302221 is an equidigital number, since it uses as much as digits as its factorization.

144302221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30531.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 144302221 is about 12012.5859414199. The cubic root of 144302221 is about 524.5147092252.

Adding to 144302221 its reverse (122203441), we get a palindrome (266505662).

The spelling of 144302221 in words is "one hundred forty-four million, three hundred two thousand, two hundred twenty-one".