228065641 has 4 divisors (see below), whose sum is σ = 231804484. Its totient is φ = 224326800.

The previous prime is 228065639. The next prime is 228065689. The reversal of 228065641 is 146560822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146560822 = 2 ⋅73280411.

It can be written as a sum of positive squares in 2 ways, for example, as 27248400 + 200817241 = 5220^2 + 14171^2 .

It is a cyclic number.

It is not a de Polignac number, because 228065641 - 2¹ = 228065639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228065597 and 228065606.

It is not an unprimeable number, because it can be changed into a prime (228035641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1869330 + ... + 1869451.

It is an arithmetic number, because the mean of its divisors is an integer number (57951121).

Almost surely, 2^228065641 is an apocalyptic number.

It is an amenable number.

228065641 is a deficient number, since it is larger than the sum of its proper divisors (3738843).

228065641 is an equidigital number, since it uses as much as digits as its factorization.

228065641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738842.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 228065641 is about 15101.8423048316. The cubic root of 228065641 is about 610.9700957628.

The spelling of 228065641 in words is "two hundred twenty-eight million, sixty-five thousand, six hundred forty-one".