226175821 has 2 divisors, whose sum is σ = 226175822. Its totient is φ = 226175820.

The previous prime is 226175809. The next prime is 226175839. The reversal of 226175821 is 128571622.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139499721 + 86676100 = 11811^2 + 9310^2 .

It is a cyclic number.

It is not a de Polignac number, because 226175821 - 2⁷ = 226175693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226175801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113087910 + 113087911.

It is an arithmetic number, because the mean of its divisors is an integer number (113087911).

Almost surely, 2^226175821 is an apocalyptic number.

It is an amenable number.

226175821 is a deficient number, since it is larger than the sum of its proper divisors (1).

226175821 is an equidigital number, since it uses as much as digits as its factorization.

226175821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 226175821 is about 15039.1429609536. The cubic root of 226175821 is about 609.2778527616.

The spelling of 226175821 in words is "two hundred twenty-six million, one hundred seventy-five thousand, eight hundred twenty-one".