228585931 has 6 divisors (see below), whose sum is σ = 265906140. Its totient is φ = 195930756.

The previous prime is 228585911. The next prime is 228585953. The reversal of 228585931 is 139585822.

It is not a de Polignac number, because 228585931 - 2⁵ = 228585899 is a prime.

It is a super-2 number, since 2×228585931² = 104503055702273522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228585911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2332461 + ... + 2332558.

It is an arithmetic number, because the mean of its divisors is an integer number (44317690).

Almost surely, 2^228585931 is an apocalyptic number.

228585931 is a deficient number, since it is larger than the sum of its proper divisors (37320209).

228585931 is an equidigital number, since it uses as much as digits as its factorization.

228585931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665033 (or 4665026 counting only the distinct ones).

The product of its digits is 172800, while the sum is 43.

The square root of 228585931 is about 15119.0585355041. The cubic root of 228585931 is about 611.4343483731.

The spelling of 228585931 in words is "two hundred twenty-eight million, five hundred eighty-five thousand, nine hundred thirty-one".