2266055821 has 4 divisors (see below), whose sum is σ = 2266164544. Its totient is φ = 2265947100.

The previous prime is 2266055819. The next prime is 2266055837. The reversal of 2266055821 is 1285506622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2266055821 - 2¹ = 2266055819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2266055801) 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, 12195 + ... + 68416.

It is an arithmetic number, because the mean of its divisors is an integer number (566541136).

Almost surely, 2^2266055821 is an apocalyptic number.

It is an amenable number.

2266055821 is a deficient number, since it is larger than the sum of its proper divisors (108723).

2266055821 is an equidigital number, since it uses as much as digits as its factorization.

2266055821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108722.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 2266055821 is about 47603.1072620265. The cubic root of 2266055821 is about 1313.4802127221.

The spelling of 2266055821 in words is "two billion, two hundred sixty-six million, fifty-five thousand, eight hundred twenty-one".