220838401 has 4 divisors (see below), whose sum is σ = 252386752. Its totient is φ = 189290052.

The previous prime is 220838399. The next prime is 220838447. The reversal of 220838401 is 104838022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104838022 = 2 ⋅52419011.

It is not a de Polignac number, because 220838401 - 2¹ = 220838399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220838401.

It is not an unprimeable number, because it can be changed into a prime (220838701) 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, 15774165 + ... + 15774178.

It is an arithmetic number, because the mean of its divisors is an integer number (63096688).

Almost surely, 2^220838401 is an apocalyptic number.

It is an amenable number.

220838401 is a deficient number, since it is larger than the sum of its proper divisors (31548351).

220838401 is an equidigital number, since it uses as much as digits as its factorization.

220838401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31548350.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 220838401 is about 14860.6325908422. The cubic root of 220838401 is about 604.4469604046.

The spelling of 220838401 in words is "two hundred twenty million, eight hundred thirty-eight thousand, four hundred one".