2213720081 has 8 divisors (see below), whose sum is σ = 2224008384. Its totient is φ = 2203452720.

The previous prime is 2213720071. The next prime is 2213720083. The reversal of 2213720081 is 1800273122.

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 2213720081 - 2¹⁴ = 2213703697 is a prime.

It is a super-2 number, since 2×2213720081² = 9801113194045293122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2213720081.

It is not an unprimeable number, because it can be changed into a prime (2213720083) 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 7 ways as a sum of consecutive naturals, for example, 230726 + ... + 240128.

It is an arithmetic number, because the mean of its divisors is an integer number (278001048).

Almost surely, 2^2213720081 is an apocalyptic number.

It is an amenable number.

2213720081 is a deficient number, since it is larger than the sum of its proper divisors (10288303).

2213720081 is an equidigital number, since it uses as much as digits as its factorization.

2213720081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10471.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 2213720081 is about 47050.1868327853. The cubic root of 2213720081 is about 1303.2895155514.

The spelling of 2213720081 in words is "two billion, two hundred thirteen million, seven hundred twenty thousand, eighty-one".