145740223 has 2 divisors, whose sum is σ = 145740224. Its totient is φ = 145740222.

The previous prime is 145740211. The next prime is 145740229. The reversal of 145740223 is 322047541.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145740223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145740191 and 145740200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145740229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72870111 + 72870112.

It is an arithmetic number, because the mean of its divisors is an integer number (72870112).

Almost surely, 2^145740223 is an apocalyptic number.

145740223 is a deficient number, since it is larger than the sum of its proper divisors (1).

145740223 is an equidigital number, since it uses as much as digits as its factorization.

145740223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 145740223 is about 12072.2915388919. The cubic root of 145740223 is about 526.2512534128.

Adding to 145740223 its reverse (322047541), we get a palindrome (467787764).

The spelling of 145740223 in words is "one hundred forty-five million, seven hundred forty thousand, two hundred twenty-three".