226633721 has 2 divisors, whose sum is σ = 226633722. Its totient is φ = 226633720.

The previous prime is 226633717. The next prime is 226633751. The reversal of 226633721 is 127336622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218448400 + 8185321 = 14780^2 + 2861^2 .

It is a cyclic number.

It is not a de Polignac number, because 226633721 - 2² = 226633717 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (226633751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113316860 + 113316861.

It is an arithmetic number, because the mean of its divisors is an integer number (113316861).

Almost surely, 2^226633721 is an apocalyptic number.

It is an amenable number.

226633721 is a deficient number, since it is larger than the sum of its proper divisors (1).

226633721 is an equidigital number, since it uses as much as digits as its factorization.

226633721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 32.

The square root of 226633721 is about 15054.3588704401. The cubic root of 226633721 is about 609.6887429347.

The spelling of 226633721 in words is "two hundred twenty-six million, six hundred thirty-three thousand, seven hundred twenty-one".