228687755 has 4 divisors (see below), whose sum is σ = 274425312. Its totient is φ = 182950200.

The previous prime is 228687749. The next prime is 228687763. The reversal of 228687755 is 557786822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 228687755 - 2⁸ = 228687499 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 22868771 + ... + 22868780.

It is an arithmetic number, because the mean of its divisors is an integer number (68606328).

Almost surely, 2^228687755 is an apocalyptic number.

228687755 is a deficient number, since it is larger than the sum of its proper divisors (45737557).

228687755 is an equidigital number, since it uses as much as digits as its factorization.

228687755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45737556.

The product of its digits is 1881600, while the sum is 50.

The square root of 228687755 is about 15122.4255660261. The cubic root of 228687755 is about 611.5251230600.

The spelling of 228687755 in words is "two hundred twenty-eight million, six hundred eighty-seven thousand, seven hundred fifty-five".