228756117 has 4 divisors (see below), whose sum is σ = 305008160. Its totient is φ = 152504076.

The previous prime is 228756061. The next prime is 228756119. The reversal of 228756117 is 711657822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 228756117 - 2²⁶ = 161647253 is a prime.

It is a super-2 number, since 2×228756117² = 104658722129835378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228756119) 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, 38126017 + ... + 38126022.

It is an arithmetic number, because the mean of its divisors is an integer number (76252040).

Almost surely, 2^228756117 is an apocalyptic number.

It is an amenable number.

228756117 is a deficient number, since it is larger than the sum of its proper divisors (76252043).

228756117 is an equidigital number, since it uses as much as digits as its factorization.

228756117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76252042.

The product of its digits is 47040, while the sum is 39.

The square root of 228756117 is about 15124.6856826845. The cubic root of 228756117 is about 611.5860517202.

The spelling of 228756117 in words is "two hundred twenty-eight million, seven hundred fifty-six thousand, one hundred seventeen".