228220226 has 16 divisors (see below), whose sum is σ = 375621624. Its totient is φ = 103344384.

The previous prime is 228220219. The next prime is 228220231. The reversal of 228220226 is 622022822.

228220226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 219069601 + 9150625 = 14801^2 + 3025^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 228220195 and 228220204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81431 + ... + 84186.

Almost surely, 2^228220226 is an apocalyptic number.

228220226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

228220226 is a deficient number, since it is larger than the sum of its proper divisors (147401398).

228220226 is a wasteful number, since it uses less digits than its factorization.

228220226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165685.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 228220226 is about 15106.9595220216. The cubic root of 228220226 is about 611.1081049794.

The spelling of 228220226 in words is "two hundred twenty-eight million, two hundred twenty thousand, two hundred twenty-six".