228363838181 has 8 divisors (see below), whose sum is σ = 230745651864. Its totient is φ = 225982586880.

The previous prime is 228363838159. The next prime is 228363838207. The reversal of 228363838181 is 181838363822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6800641156 + 221563197025 = 82466^2 + 470705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228363838181 - 2¹⁴ = 228363821797 is a prime.

It is a super-2 number, since 2×228363838181² (a number of 24 digits) 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 (228363838111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701951 + ... + 974403.

It is an arithmetic number, because the mean of its divisors is an integer number (28843206483).

Almost surely, 2^228363838181 is an apocalyptic number.

It is an amenable number.

228363838181 is a deficient number, since it is larger than the sum of its proper divisors (2381813683).

228363838181 is an equidigital number, since it uses as much as digits as its factorization.

228363838181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281191.

The product of its digits is 2654208, while the sum is 53.

The spelling of 228363838181 in words is "two hundred twenty-eight billion, three hundred sixty-three million, eight hundred thirty-eight thousand, one hundred eighty-one".