228172226 has 4 divisors (see below), whose sum is σ = 342258342. Its totient is φ = 114086112.

The previous prime is 228172223. The next prime is 228172247. The reversal of 228172226 is 622271822.

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

It can be written as a sum of positive squares in only one way, i.e., 179158225 + 49014001 = 13385^2 + 7001^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 228172192 and 228172201.

It is not an unprimeable number, because it can be changed into a prime (228172223) 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 as a sum of consecutive naturals, namely, 57043055 + ... + 57043058.

Almost surely, 2^228172226 is an apocalyptic number.

228172226 is a deficient number, since it is larger than the sum of its proper divisors (114086116).

228172226 is a wasteful number, since it uses less digits than its factorization.

228172226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114086115.

The product of its digits is 10752, while the sum is 32.

The square root of 228172226 is about 15105.3707667174. The cubic root of 228172226 is about 611.0652585787.

The spelling of 228172226 in words is "two hundred twenty-eight million, one hundred seventy-two thousand, two hundred twenty-six".