228509760191 has 4 divisors (see below), whose sum is σ = 228515559984. Its totient is φ = 228503960400.

The previous prime is 228509760179. The next prime is 228509760209. The reversal of 228509760191 is 191067905822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191067905822 = 2 ⋅95533952911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228509760191 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 (228509760691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2840390 + ... + 2919731.

It is an arithmetic number, because the mean of its divisors is an integer number (57128889996).

Almost surely, 2^228509760191 is an apocalyptic number.

228509760191 is a deficient number, since it is larger than the sum of its proper divisors (5799793).

228509760191 is an equidigital number, since it uses as much as digits as its factorization.

228509760191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5799792.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 228509760191 in words is "two hundred twenty-eight billion, five hundred nine million, seven hundred sixty thousand, one hundred ninety-one".