228872311 has 4 divisors (see below), whose sum is σ = 231444000. Its totient is φ = 226300624.

The previous prime is 228872299. The next prime is 228872339. The reversal of 228872311 is 113278822.

228872311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113278822 = 2 ⋅56639411.

It is a cyclic number.

It is not a de Polignac number, because 228872311 - 2⁵ = 228872279 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 (228872341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285711 + ... + 1285888.

It is an arithmetic number, because the mean of its divisors is an integer number (57861000).

Almost surely, 2^228872311 is an apocalyptic number.

228872311 is a deficient number, since it is larger than the sum of its proper divisors (2571689).

228872311 is an equidigital number, since it uses as much as digits as its factorization.

228872311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571688.

The product of its digits is 10752, while the sum is 34.

The square root of 228872311 is about 15128.5263988268. The cubic root of 228872311 is about 611.6895835255.

The spelling of 228872311 in words is "two hundred twenty-eight million, eight hundred seventy-two thousand, three hundred eleven".