226610821 has 8 divisors (see below), whose sum is σ = 229838040. Its totient is φ = 223398912.

The previous prime is 226610819. The next prime is 226610831. The reversal of 226610821 is 128016622.

It can be written as a sum of positive squares in 4 ways, for example, as 27941796 + 198669025 = 5286^2 + 14095^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 226610821 - 2¹ = 226610819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 226610821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226610801) 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, 27811 + ... + 35023.

It is an arithmetic number, because the mean of its divisors is an integer number (28729755).

Almost surely, 2^226610821 is an apocalyptic number.

It is an amenable number.

226610821 is a deficient number, since it is larger than the sum of its proper divisors (3227219).

226610821 is an equidigital number, since it uses as much as digits as its factorization.

226610821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 226610821 is about 15053.5982741669. The cubic root of 226610821 is about 609.6682070932.

The spelling of 226610821 in words is "two hundred twenty-six million, six hundred ten thousand, eight hundred twenty-one".