1445223321 has 12 divisors (see below), whose sum is σ = 2087896980. Its totient is φ = 963319680.

The previous prime is 1445223313. The next prime is 1445223337. The reversal of 1445223321 is 1233225441.

It can be written as a sum of positive squares in 2 ways, for example, as 375933321 + 1069290000 = 19389^2 + 32700^2 .

It is not a de Polignac number, because 1445223321 - 2³ = 1445223313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1445223341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69685 + ... + 88013.

It is an arithmetic number, because the mean of its divisors is an integer number (173991415).

Almost surely, 2^1445223321 is an apocalyptic number.

It is an amenable number.

1445223321 is a deficient number, since it is larger than the sum of its proper divisors (642673659).

1445223321 is a wasteful number, since it uses less digits than its factorization.

1445223321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27096 (or 27093 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1445223321 is about 38016.0929212880. The cubic root of 1445223321 is about 1130.6069574515.

Adding to 1445223321 its reverse (1233225441), we get a palindrome (2678448762).

It can be divided in two parts, 14452 and 23321, that added together give a palindrome (37773).

The spelling of 1445223321 in words is "one billion, four hundred forty-five million, two hundred twenty-three thousand, three hundred twenty-one".