220332401 has 8 divisors (see below), whose sum is σ = 233490600. Its totient is φ = 207544960.

The previous prime is 220332377. The next prime is 220332403. The reversal of 220332401 is 104233022.

It can be written as a sum of positive squares in 4 ways, for example, as 21381376 + 198951025 = 4624^2 + 14105^2 .

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 220332401 - 2⁶ = 220332337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220332401.

It is not an unprimeable number, because it can be changed into a prime (220332403) 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, 91466 + ... + 93843.

It is an arithmetic number, because the mean of its divisors is an integer number (29186325).

Almost surely, 2^220332401 is an apocalyptic number.

It is an amenable number.

220332401 is a deficient number, since it is larger than the sum of its proper divisors (13158199).

220332401 is a wasteful number, since it uses less digits than its factorization.

220332401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185379.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 220332401 is about 14843.5979802742. The cubic root of 220332401 is about 603.9849573392.

Adding to 220332401 its reverse (104233022), we get a palindrome (324565423).

The spelling of 220332401 in words is "two hundred twenty million, three hundred thirty-two thousand, four hundred one".