226181866 has 4 divisors (see below), whose sum is σ = 339272802. Its totient is φ = 113090932.

The previous prime is 226181863. The next prime is 226181881. The reversal of 226181866 is 668181622.

226181866 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668181622 = 2 ⋅334090811.

It can be written as a sum of positive squares in only one way, i.e., 148230625 + 77951241 = 12175^2 + 8829^2 .

It is not an unprimeable number, because it can be changed into a prime (226181863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56545465 + ... + 56545468.

Almost surely, 2^226181866 is an apocalyptic number.

226181866 is a deficient number, since it is larger than the sum of its proper divisors (113090936).

226181866 is a wasteful number, since it uses less digits than its factorization.

226181866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113090935.

The product of its digits is 55296, while the sum is 40.

The square root of 226181866 is about 15039.3439351589. The cubic root of 226181866 is about 609.2832807686.

The spelling of 226181866 in words is "two hundred twenty-six million, one hundred eighty-one thousand, eight hundred sixty-six".