224210421 has 12 divisors (see below), whose sum is σ = 324781548. Its totient is φ = 149048064.

The previous prime is 224210411. The next prime is 224210423. The reversal of 224210421 is 124012422.

224210421 is a `hidden beast` number, since 2 + 242 + 1 + 0 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 68310225 + 155900196 = 8265^2 + 12486^2 .

It is not a de Polignac number, because 224210421 - 2⁷ = 224210293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224210394 and 224210403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224210423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32110 + ... + 38463.

It is an arithmetic number, because the mean of its divisors is an integer number (27065129).

Almost surely, 2^224210421 is an apocalyptic number.

It is an amenable number.

224210421 is a deficient number, since it is larger than the sum of its proper divisors (100571127).

224210421 is a wasteful number, since it uses less digits than its factorization.

224210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70932 (or 70929 counting only the distinct ones).

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

The square root of 224210421 is about 14973.6575692113. The cubic root of 224210421 is about 607.5079021479.

Adding to 224210421 its reverse (124012422), we get a palindrome (348222843).

The spelling of 224210421 in words is "two hundred twenty-four million, two hundred ten thousand, four hundred twenty-one".