228775911 has 32 divisors (see below), whose sum is σ = 378352128. Its totient is φ = 119733120.

The previous prime is 228775901. The next prime is 228775949. The reversal of 228775911 is 119577822.

It is not a de Polignac number, because 228775911 - 2¹³ = 228767719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228775901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32565 + ... + 38961.

It is an arithmetic number, because the mean of its divisors is an integer number (11823504).

Almost surely, 2^228775911 is an apocalyptic number.

228775911 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

228775911 is a deficient number, since it is larger than the sum of its proper divisors (149576217).

228775911 is a wasteful number, since it uses less digits than its factorization.

228775911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6551.

The product of its digits is 70560, while the sum is 42.

The square root of 228775911 is about 15125.3400292357. The cubic root of 228775911 is about 611.6036911540.

The spelling of 228775911 in words is "two hundred twenty-eight million, seven hundred seventy-five thousand, nine hundred eleven".