224070821 has 8 divisors (see below), whose sum is σ = 249091584. Its totient is φ = 200162160.

The previous prime is 224070809. The next prime is 224070827. The reversal of 224070821 is 128070422.

224070821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 224070821 - 2⁶ = 224070757 is a prime.

It is a super-2 number, since 2×224070821² = 100415465647228082, which contains 22 as substring.

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 (224070827) 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, 277601 + ... + 278406.

It is an arithmetic number, because the mean of its divisors is an integer number (31136448).

Almost surely, 2^224070821 is an apocalyptic number.

It is an amenable number.

224070821 is a deficient number, since it is larger than the sum of its proper divisors (25020763).

224070821 is a wasteful number, since it uses less digits than its factorization.

224070821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556051.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 224070821 is about 14968.9953236682. The cubic root of 224070821 is about 607.3817918773.

The spelling of 224070821 in words is "two hundred twenty-four million, seventy thousand, eight hundred twenty-one".