228752257 has 4 divisors (see below), whose sum is σ = 232502356. Its totient is φ = 225002160.

The previous prime is 228752239. The next prime is 228752269. The reversal of 228752257 is 752257822.

228752257 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 13220496 + 215531761 = 3636^2 + 14681^2 .

It is not a de Polignac number, because 228752257 - 2⁷ = 228752129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228752057) 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, 1874958 + ... + 1875079.

It is an arithmetic number, because the mean of its divisors is an integer number (58125589).

Almost surely, 2^228752257 is an apocalyptic number.

It is an amenable number.

228752257 is a deficient number, since it is larger than the sum of its proper divisors (3750099).

228752257 is an equidigital number, since it uses as much as digits as its factorization.

228752257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750098.

The product of its digits is 156800, while the sum is 40.

The square root of 228752257 is about 15124.5580761885. The cubic root of 228752257 is about 611.5826117606.

The spelling of 228752257 in words is "two hundred twenty-eight million, seven hundred fifty-two thousand, two hundred fifty-seven".