340242213 has 4 divisors (see below), whose sum is σ = 453656288. Its totient is φ = 226828140.

The previous prime is 340242173. The next prime is 340242257. The reversal of 340242213 is 312242043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 340242213 - 2⁹ = 340241701 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 340242213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340242613) 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, 56707033 + ... + 56707038.

It is an arithmetic number, because the mean of its divisors is an integer number (113414072).

Almost surely, 2^340242213 is an apocalyptic number.

It is an amenable number.

340242213 is a deficient number, since it is larger than the sum of its proper divisors (113414075).

340242213 is a wasteful number, since it uses less digits than its factorization.

340242213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113414074.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 340242213 is about 18445.6556673923. The cubic root of 340242213 is about 698.1189039178.

Adding to 340242213 its reverse (312242043), we get a palindrome (652484256).

The spelling of 340242213 in words is "three hundred forty million, two hundred forty-two thousand, two hundred thirteen".