145305224 has 32 divisors (see below), whose sum is σ = 280528920. Its totient is φ = 70526976.

The previous prime is 145305211. The next prime is 145305229. The reversal of 145305224 is 422503541.

It is a happy number.

145305224 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 142802500 + 2502724 = 11950^2 + 1582^2 .

It is a super-2 number, since 2×145305224² = 42227216243380352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145305193 and 145305202.

It is not an unprimeable number, because it can be changed into a prime (145305229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39362 + ... + 42894.

Almost surely, 2^145305224 is an apocalyptic number.

It is an amenable number.

145305224 is a deficient number, since it is larger than the sum of its proper divisors (135223696).

145305224 is a wasteful number, since it uses less digits than its factorization.

145305224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689 (or 3685 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 145305224 is about 12054.2616530420. The cubic root of 145305224 is about 525.7271544413.

Adding to 145305224 its reverse (422503541), we get a palindrome (567808765).

The spelling of 145305224 in words is "one hundred forty-five million, three hundred five thousand, two hundred twenty-four".