220489621 has 4 divisors (see below), whose sum is σ = 240534144. Its totient is φ = 200445100.

The previous prime is 220489603. The next prime is 220489627. The reversal of 220489621 is 126984022.

220489621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220489621 - 2⁵ = 220489589 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 (220489627) 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, 10022245 + ... + 10022266.

It is an arithmetic number, because the mean of its divisors is an integer number (60133536).

Almost surely, 2^220489621 is an apocalyptic number.

It is an amenable number.

220489621 is a deficient number, since it is larger than the sum of its proper divisors (20044523).

220489621 is a wasteful number, since it uses less digits than its factorization.

220489621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20044522.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 220489621 is about 14848.8929216962. The cubic root of 220489621 is about 604.1285826637.

The spelling of 220489621 in words is "two hundred twenty million, four hundred eighty-nine thousand, six hundred twenty-one".