226398643 has 2 divisors, whose sum is σ = 226398644. Its totient is φ = 226398642.

The previous prime is 226398629. The next prime is 226398649. The reversal of 226398643 is 346893622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 226398643 - 2²¹ = 224301491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 226398643.

It is not a weakly prime, because it can be changed into another prime (226398649) 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, 113199321 + 113199322.

It is an arithmetic number, because the mean of its divisors is an integer number (113199322).

Almost surely, 2^226398643 is an apocalyptic number.

226398643 is a deficient number, since it is larger than the sum of its proper divisors (1).

226398643 is an equidigital number, since it uses as much as digits as its factorization.

226398643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 43.

The square root of 226398643 is about 15046.5492057149. The cubic root of 226398643 is about 609.4778681759.

The spelling of 226398643 in words is "two hundred twenty-six million, three hundred ninety-eight thousand, six hundred forty-three".