220116401 has 4 divisors (see below), whose sum is σ = 223216704. Its totient is φ = 217016100.

The previous prime is 220116361. The next prime is 220116427. The reversal of 220116401 is 104611022.

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: 104611022 = 2 ⋅52305511.

It is a cyclic number.

It is not a de Polignac number, because 220116401 - 2¹⁰ = 220115377 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 220116401.

It is not an unprimeable number, because it can be changed into a prime (220116431) 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, 1550045 + ... + 1550186.

It is an arithmetic number, because the mean of its divisors is an integer number (55804176).

Almost surely, 2^220116401 is an apocalyptic number.

It is an amenable number.

220116401 is a deficient number, since it is larger than the sum of its proper divisors (3100303).

220116401 is an equidigital number, since it uses as much as digits as its factorization.

220116401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100302.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 220116401 is about 14836.3203322118. The cubic root of 220116401 is about 603.7875232120.

Adding to 220116401 its reverse (104611022), we get a palindrome (324727423).

The spelling of 220116401 in words is "two hundred twenty million, one hundred sixteen thousand, four hundred one".