224395721 has 8 divisors (see below), whose sum is σ = 244966464. Its totient is φ = 203853520.

The previous prime is 224395709. The next prime is 224395723. The reversal of 224395721 is 127593422.

It is a happy number.

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 224395721 - 2⁶ = 224395657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (224395723) 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, 11420 + ... + 24066.

It is an arithmetic number, because the mean of its divisors is an integer number (30620808).

Almost surely, 2^224395721 is an apocalyptic number.

It is an amenable number.

224395721 is a deficient number, since it is larger than the sum of its proper divisors (20570743).

224395721 is a wasteful number, since it uses less digits than its factorization.

224395721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14271.

The product of its digits is 30240, while the sum is 35.

The square root of 224395721 is about 14979.8438242860. The cubic root of 224395721 is about 607.6752155378.

The spelling of 224395721 in words is "two hundred twenty-four million, three hundred ninety-five thousand, seven hundred twenty-one".