224214021 has 8 divisors (see below), whose sum is σ = 332168960. Its totient is φ = 149475996.

The previous prime is 224214019. The next prime is 224214047. The reversal of 224214021 is 120412422.

224214021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 224214021 - 2¹ = 224214019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 224213985 and 224214003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224214091) 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, 4152085 + ... + 4152138.

It is an arithmetic number, because the mean of its divisors is an integer number (41521120).

Almost surely, 2^224214021 is an apocalyptic number.

It is an amenable number.

224214021 is a deficient number, since it is larger than the sum of its proper divisors (107954939).

224214021 is an equidigital number, since it uses as much as digits as its factorization.

224214021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8304232 (or 8304226 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 224214021 is about 14973.7777798390. Note that the first 5 decimals coincide. The cubic root of 224214021 is about 607.5111535828.

Adding to 224214021 its reverse (120412422), we get a palindrome (344626443).

The spelling of 224214021 in words is "two hundred twenty-four million, two hundred fourteen thousand, twenty-one".