228551089 has 4 divisors (see below), whose sum is σ = 246131956. Its totient is φ = 210970224.

The previous prime is 228551087. The next prime is 228551093. The reversal of 228551089 is 980155822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 980155822 = 2 ⋅490077911.

It can be written as a sum of positive squares in 2 ways, for example, as 18533025 + 210018064 = 4305^2 + 14492^2 .

It is a cyclic number.

It is not a de Polignac number, because 228551089 - 2¹ = 228551087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228551087) 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 3 ways as a sum of consecutive naturals, for example, 8790414 + ... + 8790439.

It is an arithmetic number, because the mean of its divisors is an integer number (61532989).

Almost surely, 2^228551089 is an apocalyptic number.

It is an amenable number.

228551089 is a deficient number, since it is larger than the sum of its proper divisors (17580867).

228551089 is a wasteful number, since it uses less digits than its factorization.

228551089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17580866.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 228551089 is about 15117.9062373068. The cubic root of 228551089 is about 611.4032810221.

The spelling of 228551089 in words is "two hundred twenty-eight million, five hundred fifty-one thousand, eighty-nine".