340213 has 4 divisors (see below), whose sum is σ = 341388. Its totient is φ = 339040.

The previous prime is 340211. The next prime is 340237. The reversal of 340213 is 312043.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 88209 + 252004 = 297^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 340213 - 2¹ = 340211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340193 and 340202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340211) 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, 195 + ... + 847.

It is an arithmetic number, because the mean of its divisors is an integer number (85347).

2³⁴⁰²¹³ is an apocalyptic number.

It is an amenable number.

340213 is a deficient number, since it is larger than the sum of its proper divisors (1175).

340213 is an equidigital number, since it uses as much as digits as its factorization.

340213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 340213 is about 583.2778068811. The cubic root of 340213 is about 69.8098923317.

Adding to 340213 its reverse (312043), we get a palindrome (652256).

The spelling of 340213 in words is "three hundred forty thousand, two hundred thirteen".