228757251 has 4 divisors (see below), whose sum is σ = 305009672. Its totient is φ = 152504832.

The previous prime is 228757247. The next prime is 228757261. The reversal of 228757251 is 152757822.

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

It is not a de Polignac number, because 228757251 - 2² = 228757247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228757231) 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, 38126206 + ... + 38126211.

It is an arithmetic number, because the mean of its divisors is an integer number (76252418).

Almost surely, 2^228757251 is an apocalyptic number.

228757251 is a deficient number, since it is larger than the sum of its proper divisors (76252421).

228757251 is an equidigital number, since it uses as much as digits as its factorization.

228757251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76252420.

The product of its digits is 78400, while the sum is 39.

The square root of 228757251 is about 15124.7231710204. The cubic root of 228757251 is about 611.5870623124.

The spelling of 228757251 in words is "two hundred twenty-eight million, seven hundred fifty-seven thousand, two hundred fifty-one".