220242321 has 72 divisors (see below), whose sum is σ = 370895616. Its totient is φ = 130403520.

The previous prime is 220242307. The next prime is 220242343. The reversal of 220242321 is 123242022.

220242321 is a `hidden beast` number, since 220 + 2 + 423 + 21 = 666.

It is not a de Polignac number, because 220242321 - 2⁷ = 220242193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220242294 and 220242303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220242301) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1272991 + ... + 1273163.

It is an arithmetic number, because the mean of its divisors is an integer number (5151328).

Almost surely, 2^220242321 is an apocalyptic number.

It is an amenable number.

220242321 is a deficient number, since it is larger than the sum of its proper divisors (150653295).

220242321 is a wasteful number, since it uses less digits than its factorization.

220242321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 220242321 is about 14840.5633653174. The cubic root of 220242321 is about 603.9026356880.

Adding to 220242321 its reverse (123242022), we get a palindrome (343484343).

The spelling of 220242321 in words is "two hundred twenty million, two hundred forty-two thousand, three hundred twenty-one".