220332421 has 4 divisors (see below), whose sum is σ = 220421344. Its totient is φ = 220243500.

The previous prime is 220332419. The next prime is 220332439. The reversal of 220332421 is 124233022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124233022 = 2 ⋅62116511.

It is a cyclic number.

It is not a de Polignac number, because 220332421 - 2¹ = 220332419 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 (220339421) 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, 40635 + ... + 45736.

It is an arithmetic number, because the mean of its divisors is an integer number (55105336).

Almost surely, 2^220332421 is an apocalyptic number.

It is an amenable number.

220332421 is a deficient number, since it is larger than the sum of its proper divisors (88923).

220332421 is an equidigital number, since it uses as much as digits as its factorization.

220332421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88922.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 220332421 is about 14843.5986539653. The cubic root of 220332421 is about 603.9849756142.

Adding to 220332421 its reverse (124233022), we get a palindrome (344565443).

The spelling of 220332421 in words is "two hundred twenty million, three hundred thirty-two thousand, four hundred twenty-one".