145224231 has 8 divisors (see below), whose sum is σ = 202051200. Its totient is φ = 92606712.

The previous prime is 145224179. The next prime is 145224253. The reversal of 145224231 is 132422541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145224231 - 2¹¹ = 145222183 is a prime.

It is a super-2 number, since 2×145224231² = 42180154539082722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145224731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052281 + ... + 1052418.

It is an arithmetic number, because the mean of its divisors is an integer number (25256400).

Almost surely, 2^145224231 is an apocalyptic number.

145224231 is a deficient number, since it is larger than the sum of its proper divisors (56826969).

145224231 is a wasteful number, since it uses less digits than its factorization.

145224231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104725.

The product of its digits is 1920, while the sum is 24.

The square root of 145224231 is about 12050.9016675102. The cubic root of 145224231 is about 525.6294563405.

Adding to 145224231 its reverse (132422541), we get a palindrome (277646772).

The spelling of 145224231 in words is "one hundred forty-five million, two hundred twenty-four thousand, two hundred thirty-one".