220446421 has 8 divisors (see below), whose sum is σ = 247726080. Its totient is φ = 194641392.

The previous prime is 220446383. The next prime is 220446431. The reversal of 220446421 is 124644022.

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 220446421 - 2⁹ = 220445909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220446431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368341 + ... + 368938.

It is an arithmetic number, because the mean of its divisors is an integer number (30965760).

Almost surely, 2^220446421 is an apocalyptic number.

It is an amenable number.

220446421 is a deficient number, since it is larger than the sum of its proper divisors (27279659).

220446421 is a wasteful number, since it uses less digits than its factorization.

220446421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737315.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 220446421 is about 14847.4381965375. The cubic root of 220446421 is about 604.0891249343.

The spelling of 220446421 in words is "two hundred twenty million, four hundred forty-six thousand, four hundred twenty-one".