222440421 has 8 divisors (see below), whose sum is σ = 338956864. Its totient is φ = 127108800.

The previous prime is 222440401. The next prime is 222440431. The reversal of 222440421 is 124044222.

222440421 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 not a de Polignac number, because 222440421 - 2⁵ = 222440389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10592401 = 222440421 / (2 + 2 + 2 + 4 + 4 + 0 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222440401) 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, 5296180 + ... + 5296221.

It is an arithmetic number, because the mean of its divisors is an integer number (42369608).

Almost surely, 2^222440421 is an apocalyptic number.

222440421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222440421 is a deficient number, since it is larger than the sum of its proper divisors (116516443).

222440421 is a wasteful number, since it uses less digits than its factorization.

222440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10592411.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 222440421 is about 14914.4366638502. The cubic root of 222440421 is about 605.9050461732.

Adding to 222440421 its reverse (124044222), we get a palindrome (346484643).

The spelling of 222440421 in words is "two hundred twenty-two million, four hundred forty thousand, four hundred twenty-one".