2221808801 has 4 divisors (see below), whose sum is σ = 2252244612. Its totient is φ = 2191372992.

The previous prime is 2221808791. The next prime is 2221808821. The reversal of 2221808801 is 1088081222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1088081222 = 2 ⋅544040611.

It can be written as a sum of positive squares in 2 ways, for example, as 464187025 + 1757621776 = 21545^2 + 41924^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221808801 - 2³⁰ = 1148066977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221808821) 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 3 ways as a sum of consecutive naturals, for example, 15217796 + ... + 15217941.

It is an arithmetic number, because the mean of its divisors is an integer number (563061153).

Almost surely, 2^2221808801 is an apocalyptic number.

It is an amenable number.

2221808801 is a deficient number, since it is larger than the sum of its proper divisors (30435811).

2221808801 is an equidigital number, since it uses as much as digits as its factorization.

2221808801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30435810.

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 2221808801 is about 47136.0668808928. The cubic root of 2221808801 is about 1304.8749509025.

The spelling of 2221808801 in words is "two billion, two hundred twenty-one million, eight hundred eight thousand, eight hundred one".