228145155 has 16 divisors (see below), whose sum is σ = 417179904. Its totient is φ = 104294880.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145155 is 551541822.

It is an interprime number because it is at equal distance from previous prime (228145123) and next prime (228145187).

It is not a de Polignac number, because 228145155 - 2⁵ = 228145123 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, 1086301 + ... + 1086510.

It is an arithmetic number, because the mean of its divisors is an integer number (26073744).

Almost surely, 2^228145155 is an apocalyptic number.

228145155 is a deficient number, since it is larger than the sum of its proper divisors (189034749).

228145155 is a wasteful number, since it uses less digits than its factorization.

228145155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172826.

The product of its digits is 16000, while the sum is 33.

The square root of 228145155 is about 15104.4746681240. The cubic root of 228145155 is about 611.0410914511.

Adding to 228145155 its reverse (551541822), we get a palindrome (779686977).

The spelling of 228145155 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred fifty-five".