228032505 has 12 divisors (see below), whose sum is σ = 395256420. Its totient is φ = 121617312.

The previous prime is 228032503. The next prime is 228032533. The reversal of 228032505 is 505230822.

It can be written as a sum of positive squares in 2 ways, for example, as 118788201 + 109244304 = 10899^2 + 10452^2 .

It is not a de Polignac number, because 228032505 - 2¹ = 228032503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228032501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2533650 + ... + 2533739.

It is an arithmetic number, because the mean of its divisors is an integer number (32938035).

Almost surely, 2^228032505 is an apocalyptic number.

It is an amenable number.

228032505 is a deficient number, since it is larger than the sum of its proper divisors (167223915).

228032505 is a wasteful number, since it uses less digits than its factorization.

228032505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067400 (or 5067397 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 228032505 is about 15100.7451802883. The cubic root of 228032505 is about 610.9405047416.

The spelling of 228032505 in words is "two hundred twenty-eight million, thirty-two thousand, five hundred five".