2268722821 has 8 divisors (see below), whose sum is σ = 2331287840. Its totient is φ = 2206223568.

The previous prime is 2268722803. The next prime is 2268722831. The reversal of 2268722821 is 1282278622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2268722821 - 2²³ = 2260334213 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 (2268722831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58090 + ... + 88948.

It is an arithmetic number, because the mean of its divisors is an integer number (291410980).

Almost surely, 2^2268722821 is an apocalyptic number.

It is an amenable number.

2268722821 is a deficient number, since it is larger than the sum of its proper divisors (62565019).

2268722821 is a wasteful number, since it uses less digits than its factorization.

2268722821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32883.

The product of its digits is 86016, while the sum is 40.

The square root of 2268722821 is about 47631.1119017812. Note that the first 3 decimals coincide. The cubic root of 2268722821 is about 1313.9953042312.

The spelling of 2268722821 in words is "two billion, two hundred sixty-eight million, seven hundred twenty-two thousand, eight hundred twenty-one".