220401001 has 8 divisors (see below), whose sum is σ = 225521280. Its totient is φ = 215298768.

The previous prime is 220400981. The next prime is 220401011. The reversal of 220401001 is 100104022.

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 220401001 - 2¹¹ = 220398953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220401011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21970 + ... + 30388.

It is an arithmetic number, because the mean of its divisors is an integer number (28190160).

Almost surely, 2^220401001 is an apocalyptic number.

It is an amenable number.

220401001 is a deficient number, since it is larger than the sum of its proper divisors (5120279).

220401001 is an equidigital number, since it uses as much as digits as its factorization.

220401001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9023.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 220401001 is about 14845.9085609470. The cubic root of 220401001 is about 604.0476339565.

Adding to 220401001 its reverse (100104022), we get a palindrome (320505023).

The spelling of 220401001 in words is "two hundred twenty million, four hundred one thousand, one".