228222389 has 4 divisors (see below), whose sum is σ = 231111360. Its totient is φ = 225333420.

The previous prime is 228222383. The next prime is 228222391. The reversal of 228222389 is 983222822.

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.

It is a cyclic number.

It is not a de Polignac number, because 228222389 - 2¹² = 228218293 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 (228222383) 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, 1444367 + ... + 1444524.

It is an arithmetic number, because the mean of its divisors is an integer number (57777840).

Almost surely, 2^228222389 is an apocalyptic number.

It is an amenable number.

228222389 is a deficient number, since it is larger than the sum of its proper divisors (2888971).

228222389 is an equidigital number, since it uses as much as digits as its factorization.

228222389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888970.

The product of its digits is 55296, while the sum is 38.

The square root of 228222389 is about 15107.0311113733. The cubic root of 228222389 is about 611.1100356039.

The spelling of 228222389 in words is "two hundred twenty-eight million, two hundred twenty-two thousand, three hundred eighty-nine".