228307503 has 4 divisors (see below), whose sum is σ = 304410008. Its totient is φ = 152205000.

The previous prime is 228307487. The next prime is 228307523. The reversal of 228307503 is 305703822.

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

It is not a de Polignac number, because 228307503 - 2⁴ = 228307487 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 (228307523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38051248 + ... + 38051253.

It is an arithmetic number, because the mean of its divisors is an integer number (76102502).

Almost surely, 2^228307503 is an apocalyptic number.

228307503 is a deficient number, since it is larger than the sum of its proper divisors (76102505).

228307503 is an equidigital number, since it uses as much as digits as its factorization.

228307503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76102504.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 228307503 is about 15109.8478814315. The cubic root of 228307503 is about 611.1859959497.

The spelling of 228307503 in words is "two hundred twenty-eight million, three hundred seven thousand, five hundred three".