144504221 has 2 divisors, whose sum is σ = 144504222. Its totient is φ = 144504220.

The previous prime is 144504211. The next prime is 144504229. The reversal of 144504221 is 122405441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144264121 + 240100 = 12011^2 + 490^2 .

It is an emirp because it is prime and its reverse (122405441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144504221 - 2¹⁰ = 144503197 is a prime.

It is equal to p_8152313 and since 144504221 and 8152313 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144504229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72252110 + 72252111.

It is an arithmetic number, because the mean of its divisors is an integer number (72252111).

Almost surely, 2^144504221 is an apocalyptic number.

It is an amenable number.

144504221 is a deficient number, since it is larger than the sum of its proper divisors (1).

144504221 is an equidigital number, since it uses as much as digits as its factorization.

144504221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 144504221 is about 12020.9908493435. The cubic root of 144504221 is about 524.7593406437.

Adding to 144504221 its reverse (122405441), we get a palindrome (266909662).

The spelling of 144504221 in words is "one hundred forty-four million, five hundred four thousand, two hundred twenty-one".