228181123 has 4 divisors (see below), whose sum is σ = 241603560. Its totient is φ = 214758688.

The previous prime is 228181117. The next prime is 228181141. The reversal of 228181123 is 321181822.

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

It is not a de Polignac number, because 228181123 - 2⁹ = 228180611 is a prime.

It is a super-2 number, since 2×228181123² = 104133249787082258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228181091 and 228181100.

It is not an unprimeable number, because it can be changed into a prime (228181823) 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, 6711193 + ... + 6711226.

It is an arithmetic number, because the mean of its divisors is an integer number (60400890).

Almost surely, 2^228181123 is an apocalyptic number.

228181123 is a deficient number, since it is larger than the sum of its proper divisors (13422437).

228181123 is a wasteful number, since it uses less digits than its factorization.

228181123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13422436.

The product of its digits is 1536, while the sum is 28.

The square root of 228181123 is about 15105.6652617487. The cubic root of 228181123 is about 611.0732007912.

The spelling of 228181123 in words is "two hundred twenty-eight million, one hundred eighty-one thousand, one hundred twenty-three".