145223203 has 2 divisors, whose sum is σ = 145223204. Its totient is φ = 145223202.

The previous prime is 145223179. The next prime is 145223257. The reversal of 145223203 is 302322541.

It is a weak prime.

It is an emirp because it is prime and its reverse (302322541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145223203 is a prime.

It is not a weakly prime, because it can be changed into another prime (145223303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72611601 + 72611602.

It is an arithmetic number, because the mean of its divisors is an integer number (72611602).

Almost surely, 2^145223203 is an apocalyptic number.

145223203 is a deficient number, since it is larger than the sum of its proper divisors (1).

145223203 is an equidigital number, since it uses as much as digits as its factorization.

145223203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 145223203 is about 12050.8590150246. The cubic root of 145223203 is about 525.6282160783.

Adding to 145223203 its reverse (302322541), we get a palindrome (447545744).

The spelling of 145223203 in words is "one hundred forty-five million, two hundred twenty-three thousand, two hundred three".