228133277 has 4 divisors (see below), whose sum is σ = 231021120. Its totient is φ = 225245436.

The previous prime is 228133267. The next prime is 228133303. The reversal of 228133277 is 772331822.

It is a happy number.

228133277 is nontrivially palindromic in base 16.

228133277 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228133277 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 (228133267) 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, 1443803 + ... + 1443960.

It is an arithmetic number, because the mean of its divisors is an integer number (57755280).

Almost surely, 2^228133277 is an apocalyptic number.

It is an amenable number.

228133277 is a deficient number, since it is larger than the sum of its proper divisors (2887843).

228133277 is an equidigital number, since it uses as much as digits as its factorization.

228133277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887842.

The product of its digits is 28224, while the sum is 35.

The square root of 228133277 is about 15104.0814682655. The cubic root of 228133277 is about 611.0304869860.

The spelling of 228133277 in words is "two hundred twenty-eight million, one hundred thirty-three thousand, two hundred seventy-seven".