228145132 has 12 divisors (see below), whose sum is σ = 399669480. Its totient is φ = 113953856.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145132 is 231541822.

It is a self number, because there is not a number n which added to its sum of digits gives 228145132.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25282 + ... + 33097.

It is an arithmetic number, because the mean of its divisors is an integer number (33305790).

Almost surely, 2^228145132 is an apocalyptic number.

It is an amenable number.

228145132 is a deficient number, since it is larger than the sum of its proper divisors (171524348).

228145132 is a wasteful number, since it uses less digits than its factorization.

228145132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59360 (or 59358 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 228145132 is about 15104.4739067602. The cubic root of 228145132 is about 611.0410709175.

Adding to 228145132 its reverse (231541822), we get a palindrome (459686954).

The spelling of 228145132 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred thirty-two".