228207155 has 16 divisors (see below), whose sum is σ = 299290464. Its totient is φ = 165665280.

The previous prime is 228207131. The next prime is 228207179. The reversal of 228207155 is 551702822.

It is a happy number.

228207155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (228207131) and next prime (228207179).

It is not a de Polignac number, because 228207155 - 2⁸ = 228206899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29117 + ... + 36113.

It is an arithmetic number, because the mean of its divisors is an integer number (18705654).

Almost surely, 2^228207155 is an apocalyptic number.

228207155 is a deficient number, since it is larger than the sum of its proper divisors (71083309).

228207155 is a wasteful number, since it uses less digits than its factorization.

228207155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7606.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 228207155 is about 15106.5269006479. The cubic root of 228207155 is about 611.0964379642.

Adding to 228207155 its reverse (551702822), we get a palindrome (779909977).

The spelling of 228207155 in words is "two hundred twenty-eight million, two hundred seven thousand, one hundred fifty-five".