228532618177 has 4 divisors (see below), whose sum is σ = 234106584516. Its totient is φ = 222958651840.

The previous prime is 228532618169. The next prime is 228532618183. The reversal of 228532618177 is 771816235822.

It is a happy number.

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 139337211841 + 89195406336 = 373279^2 + 298656^2 .

It is a cyclic number.

It is not a de Polignac number, because 228532618177 - 2³ = 228532618169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228532618117) 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, 2786983108 + ... + 2786983189.

It is an arithmetic number, because the mean of its divisors is an integer number (58526646129).

Almost surely, 2^228532618177 is an apocalyptic number.

It is an amenable number.

228532618177 is a deficient number, since it is larger than the sum of its proper divisors (5573966339).

228532618177 is an equidigital number, since it uses as much as digits as its factorization.

228532618177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5573966338.

The product of its digits is 2257920, while the sum is 52.

The spelling of 228532618177 in words is "two hundred twenty-eight billion, five hundred thirty-two million, six hundred eighteen thousand, one hundred seventy-seven".