224001421 has 8 divisors (see below), whose sum is σ = 258641600. Its totient is φ = 190021248.

The previous prime is 224001391. The next prime is 224001433. The reversal of 224001421 is 124100422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 224001421 - 2¹³ = 223993229 is a prime.

It is a super-2 number, since 2×224001421² = 100353273220038482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 224001395 and 224001404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224001121) 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, 164271 + ... + 165628.

It is an arithmetic number, because the mean of its divisors is an integer number (32330200).

Almost surely, 2^224001421 is an apocalyptic number.

It is an amenable number.

224001421 is a deficient number, since it is larger than the sum of its proper divisors (34640179).

224001421 is an equidigital number, since it uses as much as digits as its factorization.

224001421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330003.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 224001421 is about 14966.6770192986. The cubic root of 224001421 is about 607.3190785965.

Adding to 224001421 its reverse (124100422), we get a palindrome (348101843).

Subtracting from 224001421 its reverse (124100422), we obtain a palindrome (99900999).

It can be divided in two parts, 224001 and 421, that added together give a palindrome (224422).

The spelling of 224001421 in words is "two hundred twenty-four million, one thousand, four hundred twenty-one".