213568934349 has 4 divisors (see below), whose sum is σ = 284758579136. Its totient is φ = 142379289564.

The previous prime is 213568934323. The next prime is 213568934363. The reversal of 213568934349 is 943439865312.

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 213568934349 - 2¹⁶ = 213568868813 is a prime.

It is a super-2 number, since 2×213568934349² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213568934549) 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, 35594822389 + ... + 35594822394.

It is an arithmetic number, because the mean of its divisors is an integer number (71189644784).

Almost surely, 2^213568934349 is an apocalyptic number.

It is an amenable number.

213568934349 is a deficient number, since it is larger than the sum of its proper divisors (71189644787).

213568934349 is an equidigital number, since it uses as much as digits as its factorization.

213568934349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71189644786.

The product of its digits is 16796160, while the sum is 57.

The spelling of 213568934349 in words is "two hundred thirteen billion, five hundred sixty-eight million, nine hundred thirty-four thousand, three hundred forty-nine".