224374021 has 4 divisors (see below), whose sum is σ = 236183200. Its totient is φ = 212564844.

The previous prime is 224374009. The next prime is 224374037. The reversal of 224374021 is 120473422.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120473422 = 2 ⋅60236711.

It is a cyclic number.

It is not a de Polignac number, because 224374021 - 2¹⁹ = 223849733 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 (224374121) 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, 5904561 + ... + 5904598.

It is an arithmetic number, because the mean of its divisors is an integer number (59045800).

Almost surely, 2^224374021 is an apocalyptic number.

It is an amenable number.

224374021 is a deficient number, since it is larger than the sum of its proper divisors (11809179).

224374021 is a wasteful number, since it uses less digits than its factorization.

224374021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11809178.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 224374021 is about 14979.1195001575. The cubic root of 224374021 is about 607.6556266657.

The spelling of 224374021 in words is "two hundred twenty-four million, three hundred seventy-four thousand, twenty-one".