220720003 has 8 divisors (see below), whose sum is σ = 256527360. Its totient is φ = 185981640.

The previous prime is 220720001. The next prime is 220720007. The reversal of 220720003 is 300027022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220720003 - 2¹ = 220720001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220720001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266803 + ... + 267628.

It is an arithmetic number, because the mean of its divisors is an integer number (32065920).

Almost surely, 2^220720003 is an apocalyptic number.

220720003 is a deficient number, since it is larger than the sum of its proper divisors (35807357).

220720003 is an equidigital number, since it uses as much as digits as its factorization.

220720003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534497.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 220720003 is about 14856.6484443834. The cubic root of 220720003 is about 604.3389204621.

Adding to 220720003 its reverse (300027022), we get a palindrome (520747025).

The spelling of 220720003 in words is "two hundred twenty million, seven hundred twenty thousand, three".