228253777 has 4 divisors (see below), whose sum is σ = 234422836. Its totient is φ = 222084720.

The previous prime is 228253757. The next prime is 228253789. The reversal of 228253777 is 777352822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 211964481 + 16289296 = 14559^2 + 4036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228253777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228253757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3084474 + ... + 3084547.

It is an arithmetic number, because the mean of its divisors is an integer number (58605709).

Almost surely, 2^228253777 is an apocalyptic number.

It is an amenable number.

228253777 is a deficient number, since it is larger than the sum of its proper divisors (6169059).

228253777 is an equidigital number, since it uses as much as digits as its factorization.

228253777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169058.

The product of its digits is 329280, while the sum is 43.

The square root of 228253777 is about 15108.0699296767. The cubic root of 228253777 is about 611.1380501537.

The spelling of 228253777 in words is "two hundred twenty-eight million, two hundred fifty-three thousand, seven hundred seventy-seven".