145431224 has 16 divisors (see below), whose sum is σ = 277306200. Its totient is φ = 71482912.

The previous prime is 145431211. The next prime is 145431229. The reversal of 145431224 is 422134541.

It is a junction number, because it is equal to n+sod(n) for n = 145431193 and 145431202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145431229) 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, 153587 + ... + 154530.

Almost surely, 2^145431224 is an apocalyptic number.

It is an amenable number.

145431224 is a deficient number, since it is larger than the sum of its proper divisors (131874976).

145431224 is a wasteful number, since it uses less digits than its factorization.

145431224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308182 (or 308178 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 145431224 is about 12059.4868879235. The cubic root of 145431224 is about 525.8790702544.

Adding to 145431224 its reverse (422134541), we get a palindrome (567565765).

The spelling of 145431224 in words is "one hundred forty-five million, four hundred thirty-one thousand, two hundred twenty-four".