226772217 has 32 divisors (see below), whose sum is σ = 388719360. Its totient is φ = 129575376.

The previous prime is 226772209. The next prime is 226772233. The reversal of 226772217 is 712277622.

It is not a de Polignac number, because 226772217 - 2³ = 226772209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (226772417) 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 31 ways as a sum of consecutive naturals, for example, 7903 + ... + 22715.

It is an arithmetic number, because the mean of its divisors is an integer number (12147480).

Almost surely, 2^226772217 is an apocalyptic number.

226772217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

226772217 is a deficient number, since it is larger than the sum of its proper divisors (161947143).

226772217 is an frugal number, since it uses more digits than its factorization.

226772217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14841 (or 14823 counting only the distinct ones).

The product of its digits is 32928, while the sum is 36.

The square root of 226772217 is about 15058.9580316833. The cubic root of 226772217 is about 609.8129113613.

The spelling of 226772217 in words is "two hundred twenty-six million, seven hundred seventy-two thousand, two hundred seventeen".