144223945 has 4 divisors (see below), whose sum is σ = 173068740. Its totient is φ = 115379152.

The previous prime is 144223939. The next prime is 144223967. The reversal of 144223945 is 549322441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45738169 + 98485776 = 6763^2 + 9924^2 .

It is a cyclic number.

It is not a de Polignac number, because 144223945 - 2⁵ = 144223913 is a prime.

It is a super-2 number, since 2×144223945² = 41601092622726050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 144223945.

It is an unprimeable number.

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, 14422390 + ... + 14422399.

It is an arithmetic number, because the mean of its divisors is an integer number (43267185).

Almost surely, 2^144223945 is an apocalyptic number.

It is an amenable number.

144223945 is a deficient number, since it is larger than the sum of its proper divisors (28844795).

144223945 is an equidigital number, since it uses as much as digits as its factorization.

144223945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28844794.

The product of its digits is 34560, while the sum is 34.

The square root of 144223945 is about 12009.3274166375. The cubic root of 144223945 is about 524.4198519665.

The spelling of 144223945 in words is "one hundred forty-four million, two hundred twenty-three thousand, nine hundred forty-five".