145306223 has 4 divisors (see below), whose sum is σ = 145333680. Its totient is φ = 145278768.

The previous prime is 145306177. The next prime is 145306229. The reversal of 145306223 is 322603541.

145306223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 145306223 - 2¹² = 145302127 is a prime.

It is a super-2 number, since 2×145306223² = 42227796885051458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145306192 and 145306201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145306229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2990 + ... + 17307.

It is an arithmetic number, because the mean of its divisors is an integer number (36333420).

Almost surely, 2^145306223 is an apocalyptic number.

145306223 is a deficient number, since it is larger than the sum of its proper divisors (27457).

145306223 is an equidigital number, since it uses as much as digits as its factorization.

145306223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27456.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 145306223 is about 12054.3030905980. The cubic root of 145306223 is about 525.7283592620.

Adding to 145306223 its reverse (322603541), we get a palindrome (467909764).

The spelling of 145306223 in words is "one hundred forty-five million, three hundred six thousand, two hundred twenty-three".