228085771 has 4 divisors (see below), whose sum is σ = 231824944. Its totient is φ = 224346600.

The previous prime is 228085763. The next prime is 228085813. The reversal of 228085771 is 177580822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228085771 - 2³ = 228085763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228085721) 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, 1869495 + ... + 1869616.

It is an arithmetic number, because the mean of its divisors is an integer number (57956236).

Almost surely, 2^228085771 is an apocalyptic number.

228085771 is a deficient number, since it is larger than the sum of its proper divisors (3739173).

228085771 is an equidigital number, since it uses as much as digits as its factorization.

228085771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739172.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 228085771 is about 15102.5087651026. The cubic root of 228085771 is about 610.9880708016.

The spelling of 228085771 in words is "two hundred twenty-eight million, eighty-five thousand, seven hundred seventy-one".