2180022891 has 4 divisors (see below), whose sum is σ = 2906697192. Its totient is φ = 1453348592.

The previous prime is 2180022883. The next prime is 2180022899. The reversal of 2180022891 is 1982200812.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2180022883) and next prime (2180022899).

It is a cyclic number.

It is not a de Polignac number, because 2180022891 - 2³ = 2180022883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2180022899) 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, 363337146 + ... + 363337151.

It is an arithmetic number, because the mean of its divisors is an integer number (726674298).

Almost surely, 2^2180022891 is an apocalyptic number.

2180022891 is a deficient number, since it is larger than the sum of its proper divisors (726674301).

2180022891 is an equidigital number, since it uses as much as digits as its factorization.

2180022891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726674300.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 2180022891 is about 46690.7152547485. The cubic root of 2180022891 is about 1296.6427953904.

The spelling of 2180022891 in words is "two billion, one hundred eighty million, twenty-two thousand, eight hundred ninety-one".