2220040891 has 4 divisors (see below), whose sum is σ = 2316564432. Its totient is φ = 2123517352.

The previous prime is 2220040873. The next prime is 2220040919. The reversal of 2220040891 is 1980400222.

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

It is a cyclic number.

It is not a de Polignac number, because 2220040891 - 2⁵ = 2220040859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220040861) 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, 48261736 + ... + 48261781.

It is an arithmetic number, because the mean of its divisors is an integer number (579141108).

Almost surely, 2^2220040891 is an apocalyptic number.

2220040891 is a deficient number, since it is larger than the sum of its proper divisors (96523541).

2220040891 is an equidigital number, since it uses as much as digits as its factorization.

2220040891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96523540.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2220040891 is about 47117.3098871317. The cubic root of 2220040891 is about 1304.5287594545.

The spelling of 2220040891 in words is "two billion, two hundred twenty million, forty thousand, eight hundred ninety-one".