224115021 has 24 divisors (see below), whose sum is σ = 353050880. Its totient is φ = 136165536.

The previous prime is 224115019. The next prime is 224115049. The reversal of 224115021 is 120511422.

It is not a de Polignac number, because 224115021 - 2¹ = 224115019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224114985 and 224115003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224115071) 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 23 ways as a sum of consecutive naturals, for example, 2881 + ... + 21366.

Almost surely, 2^224115021 is an apocalyptic number.

It is an amenable number.

224115021 is a deficient number, since it is larger than the sum of its proper divisors (128935859).

224115021 is a wasteful number, since it uses less digits than its factorization.

224115021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24345 (or 24342 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 224115021 is about 14970.4716358570. The cubic root of 224115021 is about 607.4217264392.

Adding to 224115021 its reverse (120511422), we get a palindrome (344626443).

The spelling of 224115021 in words is "two hundred twenty-four million, one hundred fifteen thousand, twenty-one".