2288228821 has 2 divisors, whose sum is σ = 2288228822. Its totient is φ = 2288228820.

The previous prime is 2288228809. The next prime is 2288228827. The reversal of 2288228821 is 1288228822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1800304900 + 487923921 = 42430^2 + 22089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2288228821 - 2⁹ = 2288228309 is a prime.

It is a super-2 number, since 2×2288228821² = 10471982274510100082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2288228827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144114410 + 1144114411.

It is an arithmetic number, because the mean of its divisors is an integer number (1144114411).

Almost surely, 2^2288228821 is an apocalyptic number.

It is an amenable number.

2288228821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2288228821 is an equidigital number, since it uses as much as digits as its factorization.

2288228821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131072, while the sum is 43.

The square root of 2288228821 is about 47835.4347842685. The cubic root of 2288228821 is about 1317.7503810212.

Subtracting from 2288228821 its reverse (1288228822), we obtain a palindrome (999999999).

The spelling of 2288228821 in words is "two billion, two hundred eighty-eight million, two hundred twenty-eight thousand, eight hundred twenty-one".