220240643 has 16 divisors (see below), whose sum is σ = 263121600. Its totient is φ = 184161600.

The previous prime is 220240607. The next prime is 220240649. The reversal of 220240643 is 346042022.

It is not a de Polignac number, because 220240643 - 2¹⁶ = 220175107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220240649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6233 + ... + 21893.

It is an arithmetic number, because the mean of its divisors is an integer number (16445100).

Almost surely, 2^220240643 is an apocalyptic number.

220240643 is a deficient number, since it is larger than the sum of its proper divisors (42880957).

220240643 is an equidigital number, since it uses as much as digits as its factorization.

220240643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15723 (or 15709 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 220240643 is about 14840.5068309677. The cubic root of 220240643 is about 603.9011019967.

Adding to 220240643 its reverse (346042022), we get a palindrome (566282665).

The spelling of 220240643 in words is "two hundred twenty million, two hundred forty thousand, six hundred forty-three".