144453221 has 4 divisors (see below), whose sum is σ = 157585344. Its totient is φ = 131321100.

The previous prime is 144453193. The next prime is 144453223. The reversal of 144453221 is 122354441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144453221 - 2⁶ = 144453157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144453223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6566045 + ... + 6566066.

It is an arithmetic number, because the mean of its divisors is an integer number (39396336).

Almost surely, 2^144453221 is an apocalyptic number.

144453221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144453221 is a deficient number, since it is larger than the sum of its proper divisors (13132123).

144453221 is a wasteful number, since it uses less digits than its factorization.

144453221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13132122.

The product of its digits is 3840, while the sum is 26.

The square root of 144453221 is about 12018.8693727821. The cubic root of 144453221 is about 524.6975987899.

The spelling of 144453221 in words is "one hundred forty-four million, four hundred fifty-three thousand, two hundred twenty-one".