224732421 has 24 divisors (see below), whose sum is σ = 336539840. Its totient is φ = 148217256.

The previous prime is 224732411. The next prime is 224732447. The reversal of 224732421 is 124237422.

It is not a de Polignac number, because 224732421 - 2¹⁵ = 224699653 is a prime.

It is a super-2 number, since 2×224732421² = 101009322097042482, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224732411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 308760 + ... + 309486.

Almost surely, 2^224732421 is an apocalyptic number.

It is an amenable number.

224732421 is a deficient number, since it is larger than the sum of its proper divisors (111807419).

224732421 is an equidigital number, since it uses as much as digits as its factorization.

224732421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 837 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 224732421 is about 14991.0780466249. The cubic root of 224732421 is about 607.9789973196.

Adding to 224732421 its reverse (124237422), we get a palindrome (348969843).

The spelling of 224732421 in words is "two hundred twenty-four million, seven hundred thirty-two thousand, four hundred twenty-one".