224310021 has 32 divisors (see below), whose sum is σ = 332478720. Its totient is φ = 133622784.

The previous prime is 224310011. The next prime is 224310043. The reversal of 224310021 is 120013422.

It is not a de Polignac number, because 224310021 - 2⁶ = 224309957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224310011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 517821 + ... + 518253.

It is an arithmetic number, because the mean of its divisors is an integer number (10389960).

Almost surely, 2^224310021 is an apocalyptic number.

It is an amenable number.

224310021 is a deficient number, since it is larger than the sum of its proper divisors (108168699).

224310021 is a wasteful number, since it uses less digits than its factorization.

224310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 224310021 is about 14976.9830406527. The cubic root of 224310021 is about 607.5978456770.

Adding to 224310021 its reverse (120013422), we get a palindrome (344323443).

The spelling of 224310021 in words is "two hundred twenty-four million, three hundred ten thousand, twenty-one".