226328721 has 8 divisors (see below), whose sum is σ = 303125760. Its totient is φ = 150208752.

The previous prime is 226328719. The next prime is 226328743. The reversal of 226328721 is 127823622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 226328721 - 2¹ = 226328719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (226327721) 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 7 ways as a sum of consecutive naturals, for example, 168486 + ... + 169823.

It is an arithmetic number, because the mean of its divisors is an integer number (37890720).

Almost surely, 2^226328721 is an apocalyptic number.

It is an amenable number.

226328721 is a deficient number, since it is larger than the sum of its proper divisors (76797039).

226328721 is a wasteful number, since it uses less digits than its factorization.

226328721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338535.

The product of its digits is 16128, while the sum is 33.

The square root of 226328721 is about 15044.2255034947. The cubic root of 226328721 is about 609.4151170644.

The spelling of 226328721 in words is "two hundred twenty-six million, three hundred twenty-eight thousand, seven hundred twenty-one".