224402021 has 4 divisors (see below), whose sum is σ = 224743200. Its totient is φ = 224060844.

The previous prime is 224402011. The next prime is 224402033. The reversal of 224402021 is 120204422.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 224402021 - 2¹⁰ = 224400997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224402011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169601 + ... + 170918.

It is an arithmetic number, because the mean of its divisors is an integer number (56185800).

Almost surely, 2^224402021 is an apocalyptic number.

It is an amenable number.

224402021 is a deficient number, since it is larger than the sum of its proper divisors (341179).

224402021 is an equidigital number, since it uses as much as digits as its factorization.

224402021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341178.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 224402021 is about 14980.0541053763. The cubic root of 224402021 is about 607.6809023932.

Adding to 224402021 its reverse (120204422), we get a palindrome (344606443).

The spelling of 224402021 in words is "two hundred twenty-four million, four hundred two thousand, twenty-one".