2220811 has 4 divisors (see below), whose sum is σ = 2317392. Its totient is φ = 2124232.

The previous prime is 2220787. The next prime is 2220839. The reversal of 2220811 is 1180222.

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 2220811 - 2¹⁹ = 1696523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220311) 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, 48256 + ... + 48301.

It is an arithmetic number, because the mean of its divisors is an integer number (579348).

2^2220811 is an apocalyptic number.

2220811 is a deficient number, since it is larger than the sum of its proper divisors (96581).

2220811 is an equidigital number, since it uses as much as digits as its factorization.

2220811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96580.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2220811 is about 1490.2385715046. The cubic root of 2220811 is about 130.4679584484.

The spelling of 2220811 in words is "two million, two hundred twenty thousand, eight hundred eleven".