220009901 has 4 divisors (see below), whose sum is σ = 223108704. Its totient is φ = 216911100.

The previous prime is 220009861. The next prime is 220009931. The reversal of 220009901 is 109900022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220009901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220009931) 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, 1549295 + ... + 1549436.

It is an arithmetic number, because the mean of its divisors is an integer number (55777176).

Almost surely, 2^220009901 is an apocalyptic number.

It is an amenable number.

220009901 is a deficient number, since it is larger than the sum of its proper divisors (3098803).

220009901 is an equidigital number, since it uses as much as digits as its factorization.

220009901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098802.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 220009901 is about 14832.7307330781. The cubic root of 220009901 is about 603.6901296747.

Adding to 220009901 its reverse (109900022), we get a palindrome (329909923).

The spelling of 220009901 in words is "two hundred twenty million, nine thousand, nine hundred one".