340221043 has 2 divisors, whose sum is σ = 340221044. Its totient is φ = 340221042.

The previous prime is 340221023. The next prime is 340221061. The reversal of 340221043 is 340122043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340221043 - 2²⁵ = 306666611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340221043.

It is not a weakly prime, because it can be changed into another prime (340221023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170110521 + 170110522.

It is an arithmetic number, because the mean of its divisors is an integer number (170110522).

Almost surely, 2^340221043 is an apocalyptic number.

340221043 is a deficient number, since it is larger than the sum of its proper divisors (1).

340221043 is an equidigital number, since it uses as much as digits as its factorization.

340221043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 340221043 is about 18445.0818106074. The cubic root of 340221043 is about 698.1044245428.

Adding to 340221043 its reverse (340122043), we get a palindrome (680343086).

The spelling of 340221043 in words is "three hundred forty million, two hundred twenty-one thousand, forty-three".