224288139 has 4 divisors (see below), whose sum is σ = 299050856. Its totient is φ = 149525424.

The previous prime is 224288137. The next prime is 224288149. The reversal of 224288139 is 931882422.

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

It is not a de Polignac number, because 224288139 - 2¹ = 224288137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 224288097 and 224288106.

It is not an unprimeable number, because it can be changed into a prime (224288137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37381354 + ... + 37381359.

It is an arithmetic number, because the mean of its divisors is an integer number (74762714).

Almost surely, 2^224288139 is an apocalyptic number.

224288139 is a deficient number, since it is larger than the sum of its proper divisors (74762717).

224288139 is an equidigital number, since it uses as much as digits as its factorization.

224288139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74762716.

The product of its digits is 55296, while the sum is 39.

The square root of 224288139 is about 14976.2525018778. The cubic root of 224288139 is about 607.5780874745.

The spelling of 224288139 in words is "two hundred twenty-four million, two hundred eighty-eight thousand, one hundred thirty-nine".