144502221 has 8 divisors (see below), whose sum is σ = 196305120. Its totient is φ = 94517072.

The previous prime is 144502187. The next prime is 144502223. The reversal of 144502221 is 122205441.

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

It is a cyclic number.

It is not a de Polignac number, because 144502221 - 2⁷ = 144502093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144502223) 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, 454251 + ... + 454568.

It is an arithmetic number, because the mean of its divisors is an integer number (24538140).

Almost surely, 2^144502221 is an apocalyptic number.

It is an amenable number.

144502221 is a deficient number, since it is larger than the sum of its proper divisors (51802899).

144502221 is an equidigital number, since it uses as much as digits as its factorization.

144502221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908875.

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

The square root of 144502221 is about 12020.9076612376. The cubic root of 144502221 is about 524.7569196683.

Adding to 144502221 its reverse (122205441), we get a palindrome (266707662).

The spelling of 144502221 in words is "one hundred forty-four million, five hundred two thousand, two hundred twenty-one".