213347585813 has 4 divisors (see below), whose sum is σ = 225897443820. Its totient is φ = 200797727808.

The previous prime is 213347585777. The next prime is 213347585819. The reversal of 213347585813 is 318585743312.

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 169692915844 + 43654669969 = 411938^2 + 208937^2 .

It is a cyclic number.

It is not a de Polignac number, because 213347585813 - 2¹² = 213347581717 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 (213347585819) 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, 6274928978 + ... + 6274929011.

It is an arithmetic number, because the mean of its divisors is an integer number (56474360955).

Almost surely, 2^213347585813 is an apocalyptic number.

It is an amenable number.

213347585813 is a deficient number, since it is larger than the sum of its proper divisors (12549858007).

213347585813 is a wasteful number, since it uses less digits than its factorization.

213347585813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12549858006.

The product of its digits is 2419200, while the sum is 50.

The spelling of 213347585813 in words is "two hundred thirteen billion, three hundred forty-seven million, five hundred eighty-five thousand, eight hundred thirteen".