224666666421 has 4 divisors (see below), whose sum is σ = 299555555232. Its totient is φ = 149777777612.

The previous prime is 224666666381. The next prime is 224666666447. The reversal of 224666666421 is 124666666422.

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.

It is a cyclic number.

It is not a de Polignac number, because 224666666421 - 2¹⁹ = 224666142133 is a prime.

It is a super-2 number, since 2×224666666421² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224666666461) 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, 37444444401 + ... + 37444444406.

It is an arithmetic number, because the mean of its divisors is an integer number (74888888808).

Almost surely, 2^224666666421 is an apocalyptic number.

It is an amenable number.

224666666421 is a deficient number, since it is larger than the sum of its proper divisors (74888888811).

224666666421 is an equidigital number, since it uses as much as digits as its factorization.

224666666421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74888888810.

The product of its digits is 5971968, while the sum is 51.

Subtracting from 224666666421 its reverse (124666666422), we obtain a palindrome (99999999999).

The spelling of 224666666421 in words is "two hundred twenty-four billion, six hundred sixty-six million, six hundred sixty-six thousand, four hundred twenty-one".