228145105 has 8 divisors (see below), whose sum is σ = 273895272. Its totient is φ = 182435328.

The previous prime is 228145091. The next prime is 228145111. The reversal of 228145105 is 501541822.

It can be written as a sum of positive squares in 4 ways, for example, as 859329 + 227285776 = 927^2 + 15076^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 228145105 - 2⁷ = 228144977 is a prime.

It is a super-2 number, since 2×228145105² = 104100377870922050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4167 + ... + 21763.

It is an arithmetic number, because the mean of its divisors is an integer number (34236909).

Almost surely, 2^228145105 is an apocalyptic number.

It is an amenable number.

228145105 is a deficient number, since it is larger than the sum of its proper divisors (45750167).

228145105 is a wasteful number, since it uses less digits than its factorization.

228145105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20195.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 228145105 is about 15104.4730129853. The cubic root of 228145105 is about 611.0410468128.

Adding to 228145105 its reverse (501541822), we get a palindrome (729686927).

The spelling of 228145105 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred five".