228872557 has 4 divisors (see below), whose sum is σ = 229117756. Its totient is φ = 228627360.

The previous prime is 228872551. The next prime is 228872561. The reversal of 228872557 is 755278822.

228872557 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.

It can be written as a sum of positive squares in 2 ways, for example, as 133888041 + 94984516 = 11571^2 + 9746^2 .

It is a cyclic number.

It is not a de Polignac number, because 228872557 - 2¹⁹ = 228348269 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 (228872551) 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, 121194 + ... + 123067.

It is an arithmetic number, because the mean of its divisors is an integer number (57279439).

Almost surely, 2^228872557 is an apocalyptic number.

It is an amenable number.

228872557 is a deficient number, since it is larger than the sum of its proper divisors (245199).

228872557 is an equidigital number, since it uses as much as digits as its factorization.

228872557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245198.

The product of its digits is 627200, while the sum is 46.

The square root of 228872557 is about 15128.5345291605. The cubic root of 228872557 is about 611.6898026806.

The spelling of 228872557 in words is "two hundred twenty-eight million, eight hundred seventy-two thousand, five hundred fifty-seven".