220303421 has 4 divisors (see below), whose sum is σ = 237249852. Its totient is φ = 203356992.

The previous prime is 220303409. The next prime is 220303441. The reversal of 220303421 is 124303022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124303022 = 2 ⋅62151511.

It can be written as a sum of positive squares in 2 ways, for example, as 61795321 + 158508100 = 7861^2 + 12590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220303421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220303421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220303441) 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, 8473196 + ... + 8473221.

It is an arithmetic number, because the mean of its divisors is an integer number (59312463).

Almost surely, 2^220303421 is an apocalyptic number.

It is an amenable number.

220303421 is a deficient number, since it is larger than the sum of its proper divisors (16946431).

220303421 is a wasteful number, since it uses less digits than its factorization.

220303421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16946430.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 220303421 is about 14842.6217697548. The cubic root of 220303421 is about 603.9584757574.

Adding to 220303421 its reverse (124303022), we get a palindrome (344606443).

The spelling of 220303421 in words is "two hundred twenty million, three hundred three thousand, four hundred twenty-one".