145003223 has 4 divisors (see below), whose sum is σ = 145194528. Its totient is φ = 144811920.

The previous prime is 145003207. The next prime is 145003249. The reversal of 145003223 is 322300541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322300541 = 23 ⋅14013067.

It is a cyclic number.

It is not a de Polignac number, because 145003223 - 2⁴ = 145003207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145003195 and 145003204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145003273) 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, 94511 + ... + 96032.

It is an arithmetic number, because the mean of its divisors is an integer number (36298632).

Almost surely, 2^145003223 is an apocalyptic number.

145003223 is a deficient number, since it is larger than the sum of its proper divisors (191305).

145003223 is an equidigital number, since it uses as much as digits as its factorization.

145003223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191304.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 145003223 is about 12041.7284058394. The cubic root of 145003223 is about 525.3626797064.

Adding to 145003223 its reverse (322300541), we get a palindrome (467303764).

The spelling of 145003223 in words is "one hundred forty-five million, three thousand, two hundred twenty-three".