228145005 has 80 divisors (see below), whose sum is σ = 452257344. Its totient is φ = 109105920.

The previous prime is 228144977. The next prime is 228145013. The reversal of 228145005 is 500541822.

It is a happy number.

It is not a de Polignac number, because 228145005 - 2¹³ = 228136813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 228145005.

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 369457 + ... + 370073.

Almost surely, 2^228145005 is an apocalyptic number.

It is an amenable number.

228145005 is a deficient number, since it is larger than the sum of its proper divisors (224112339).

228145005 is a wasteful number, since it uses less digits than its factorization.

228145005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 228145005 is about 15104.4697027072. The cubic root of 228145005 is about 611.0409575361.

Adding to 228145005 its reverse (500541822), we get a palindrome (728686827).

The spelling of 228145005 in words is "two hundred twenty-eight million, one hundred forty-five thousand, five".