2214220681 has 4 divisors (see below), whose sum is σ = 2214326164. Its totient is φ = 2214115200.

The previous prime is 2214220643. The next prime is 2214220691. The reversal of 2214220681 is 1860224122.

2214220681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1388233081 + 825987600 = 37259^2 + 28740^2 .

It is a cyclic number.

It is not a de Polignac number, because 2214220681 - 2⁷ = 2214220553 is a prime.

It is a super-2 number, since 2×2214220681² = 9805546448336207522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2214220691) 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, 9360 + ... + 67201.

It is an arithmetic number, because the mean of its divisors is an integer number (553581541).

Almost surely, 2^2214220681 is an apocalyptic number.

It is an amenable number.

2214220681 is a deficient number, since it is larger than the sum of its proper divisors (105483).

2214220681 is an equidigital number, since it uses as much as digits as its factorization.

2214220681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105482.

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

The square root of 2214220681 is about 47055.5063834191. The cubic root of 2214220681 is about 1303.3877480190.

The spelling of 2214220681 in words is "two billion, two hundred fourteen million, two hundred twenty thousand, six hundred eighty-one".