345443213 has 4 divisors (see below), whose sum is σ = 365763420. Its totient is φ = 325123008.

The previous prime is 345443207. The next prime is 345443249. The reversal of 345443213 is 312344543.

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

It can be written as a sum of positive squares in 2 ways, for example, as 238486249 + 106956964 = 15443^2 + 10342^2 .

It is a cyclic number.

It is not a de Polignac number, because 345443213 - 2¹⁰ = 345442189 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 (345443513) 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, 10160078 + ... + 10160111.

It is an arithmetic number, because the mean of its divisors is an integer number (91440855).

Almost surely, 2^345443213 is an apocalyptic number.

It is an amenable number.

345443213 is a deficient number, since it is larger than the sum of its proper divisors (20320207).

345443213 is a wasteful number, since it uses less digits than its factorization.

345443213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20320206.

The product of its digits is 17280, while the sum is 29.

The square root of 345443213 is about 18586.1026845329. The cubic root of 345443213 is about 701.6581189040.

Adding to 345443213 its reverse (312344543), we get a palindrome (657787756).

The spelling of 345443213 in words is "three hundred forty-five million, four hundred forty-three thousand, two hundred thirteen".