340420211 has 4 divisors (see below), whose sum is σ = 340525800. Its totient is φ = 340314624.

The previous prime is 340420187. The next prime is 340420237. The reversal of 340420211 is 112024043.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 340420211 - 2¹⁸ = 340158067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340420211.

It is not an unprimeable number, because it can be changed into a prime (340420411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47801 + ... + 54458.

It is an arithmetic number, because the mean of its divisors is an integer number (85131450).

Almost surely, 2^340420211 is an apocalyptic number.

340420211 is a deficient number, since it is larger than the sum of its proper divisors (105589).

340420211 is a wasteful number, since it uses less digits than its factorization.

340420211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105588.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 340420211 is about 18450.4799666567. The cubic root of 340420211 is about 698.2406231917.

Adding to 340420211 its reverse (112024043), we get a palindrome (452444254).

The spelling of 340420211 in words is "three hundred forty million, four hundred twenty thousand, two hundred eleven".