228505775 has 24 divisors (see below), whose sum is σ = 292106304. Its totient is φ = 177228800.

The previous prime is 228505699. The next prime is 228505777. The reversal of 228505775 is 577505822.

It is not a de Polignac number, because 228505775 - 2²² = 224311471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228505777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131915 + ... + 133635.

It is an arithmetic number, because the mean of its divisors is an integer number (12171096).

Almost surely, 2^228505775 is an apocalyptic number.

228505775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

228505775 is a deficient number, since it is larger than the sum of its proper divisors (63600529).

228505775 is a wasteful number, since it uses less digits than its factorization.

228505775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891 (or 1886 counting only the distinct ones).

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 228505775 is about 15116.4074766460. The cubic root of 228505775 is about 611.3628714437.

The spelling of 228505775 in words is "two hundred twenty-eight million, five hundred five thousand, seven hundred seventy-five".