224071021 has 4 divisors (see below), whose sum is σ = 224101152. Its totient is φ = 224040892.

The previous prime is 224070983. The next prime is 224071031. The reversal of 224071021 is 120170422.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 120170422 = 2 ⋅60085211.

It is a cyclic number.

It is not a de Polignac number, because 224071021 - 2²³ = 215682413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 224071021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224071031) 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, 4986 + ... + 21748.

It is an arithmetic number, because the mean of its divisors is an integer number (56025288).

Almost surely, 2^224071021 is an apocalyptic number.

It is an amenable number.

224071021 is a deficient number, since it is larger than the sum of its proper divisors (30131).

224071021 is a wasteful number, since it uses less digits than its factorization.

224071021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30130.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 224071021 is about 14969.0020041418. The cubic root of 224071021 is about 607.3819725885.

The spelling of 224071021 in words is "two hundred twenty-four million, seventy-one thousand, twenty-one".