220439903 has 4 divisors (see below), whose sum is σ = 225816528. Its totient is φ = 215063280.

The previous prime is 220439897. The next prime is 220439911. The reversal of 220439903 is 309934022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220439903 - 2¹⁶ = 220374367 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 220439903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220439503) 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, 2688251 + ... + 2688332.

It is an arithmetic number, because the mean of its divisors is an integer number (56454132).

Almost surely, 2^220439903 is an apocalyptic number.

220439903 is a deficient number, since it is larger than the sum of its proper divisors (5376625).

220439903 is an equidigital number, since it uses as much as digits as its factorization.

220439903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5376624.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 220439903 is about 14847.2186957693. The cubic root of 220439903 is about 604.0831711192.

The spelling of 220439903 in words is "two hundred twenty million, four hundred thirty-nine thousand, nine hundred three".