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228016155 = 3517894181
BaseRepresentation
bin11011001011101…
…00000000011011
3120220001102100210
431211310000123
5431333004110
634343102203
75436051063
oct1545640033
9526042323
10228016155
11107788a04
1264441963
1338316303
14223d63a3
1515040520
hexd97401b

228016155 has 16 divisors (see below), whose sum is σ = 386286624. Its totient is φ = 114455040.

The previous prime is 228016153. The next prime is 228016177. The reversal of 228016155 is 551610822.

It is not a de Polignac number, because 228016155 - 21 = 228016153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228016153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446836 + ... + 447345.

It is an arithmetic number, because the mean of its divisors is an integer number (24142914).

Almost surely, 2228016155 is an apocalyptic number.

228016155 is a deficient number, since it is larger than the sum of its proper divisors (158270469).

228016155 is a wasteful number, since it uses less digits than its factorization.

228016155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894206.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 228016155 is about 15100.2038065716. The cubic root of 228016155 is about 610.9259028526.

Adding to 228016155 its reverse (551610822), we get a palindrome (779626977).

The spelling of 228016155 in words is "two hundred twenty-eight million, sixteen thousand, one hundred fifty-five".

Divisors: 1 3 5 15 17 51 85 255 894181 2682543 4470905 13412715 15201077 45603231 76005385 228016155