340313213 has 4 divisors (see below), whose sum is σ = 340417020. Its totient is φ = 340209408.

The previous prime is 340313177. The next prime is 340313219. The reversal of 340313213 is 312313043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312313043 = 7 ⋅44616149.

It can be written as a sum of positive squares in 2 ways, for example, as 181225444 + 159087769 = 13462^2 + 12613^2 .

It is a cyclic number.

It is not a de Polignac number, because 340313213 - 2¹² = 340309117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340313219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46820 + ... + 53597.

It is an arithmetic number, because the mean of its divisors is an integer number (85104255).

Almost surely, 2^340313213 is an apocalyptic number.

It is an amenable number.

340313213 is a deficient number, since it is larger than the sum of its proper divisors (103807).

340313213 is a wasteful number, since it uses less digits than its factorization.

340313213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103806.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 340313213 is about 18447.5801394112. The cubic root of 340313213 is about 698.1674604979.

Adding to 340313213 its reverse (312313043), we get a palindrome (652626256).

The spelling of 340313213 in words is "three hundred forty million, three hundred thirteen thousand, two hundred thirteen".