220455401 has 12 divisors (see below), whose sum is σ = 229195260. Its totient is φ = 211921920.

The previous prime is 220455397. The next prime is 220455409. The reversal of 220455401 is 104554022.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 20939776 + 199515625 = 4576^2 + 14125^2 .

It is not a de Polignac number, because 220455401 - 2² = 220455397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (220455409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217985 + ... + 218993.

It is an arithmetic number, because the mean of its divisors is an integer number (19099605).

Almost surely, 2^220455401 is an apocalyptic number.

It is an amenable number.

220455401 is a deficient number, since it is larger than the sum of its proper divisors (8739859).

220455401 is an equidigital number, since it uses as much as digits as its factorization.

220455401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 220455401 is about 14847.7406025294. The cubic root of 220455401 is about 604.0973274515.

The spelling of 220455401 in words is "two hundred twenty million, four hundred fifty-five thousand, four hundred one".