220404001 has 4 divisors (see below), whose sum is σ = 220516912. Its totient is φ = 220291092.

The previous prime is 220403993. The next prime is 220404007. The reversal of 220404001 is 100404022.

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 not a de Polignac number, because 220404001 - 2³ = 220403993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220404007) 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 3 ways as a sum of consecutive naturals, for example, 53475 + ... + 57448.

It is an arithmetic number, because the mean of its divisors is an integer number (55129228).

Almost surely, 2^220404001 is an apocalyptic number.

It is an amenable number.

220404001 is a deficient number, since it is larger than the sum of its proper divisors (112911).

220404001 is a wasteful number, since it uses less digits than its factorization.

220404001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112910.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 220404001 is about 14846.0095985420. The cubic root of 220404001 is about 604.0503746197.

Adding to 220404001 its reverse (100404022), we get a palindrome (320808023).

The spelling of 220404001 in words is "two hundred twenty million, four hundred four thousand, one".