228145081 has 8 divisors (see below), whose sum is σ = 231940800. Its totient is φ = 224365680.

The previous prime is 228145061. The next prime is 228145091. The reversal of 228145081 is 180541822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228145081 - 2⁷ = 228144953 is a prime.

It is a super-2 number, since 2×228145081² = 104100355968993122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228145031) 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 7 ways as a sum of consecutive naturals, for example, 25915 + ... + 33583.

It is an arithmetic number, because the mean of its divisors is an integer number (28992600).

Almost surely, 2^228145081 is an apocalyptic number.

It is an amenable number.

228145081 is a deficient number, since it is larger than the sum of its proper divisors (3795719).

228145081 is an equidigital number, since it uses as much as digits as its factorization.

228145081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8159.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 228145081 is about 15104.4722185186. The cubic root of 228145081 is about 611.0410253864.

The spelling of 228145081 in words is "two hundred twenty-eight million, one hundred forty-five thousand, eighty-one".