340221433 has 2 divisors, whose sum is σ = 340221434. Its totient is φ = 340221432.

The previous prime is 340221379. The next prime is 340221439. The reversal of 340221433 is 334122043.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252555664 + 87665769 = 15892^2 + 9363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340221433 is a prime.

It is not a weakly prime, because it can be changed into another prime (340221439) 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, 170110716 + 170110717.

It is an arithmetic number, because the mean of its divisors is an integer number (170110717).

Almost surely, 2^340221433 is an apocalyptic number.

It is an amenable number.

340221433 is a deficient number, since it is larger than the sum of its proper divisors (1).

340221433 is an equidigital number, since it uses as much as digits as its factorization.

340221433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 340221433 is about 18445.0923825282. The cubic root of 340221433 is about 698.1046912916.

Adding to 340221433 its reverse (334122043), we get a palindrome (674343476).

The spelling of 340221433 in words is "three hundred forty million, two hundred twenty-one thousand, four hundred thirty-three".