213053316649 has 4 divisors (see below), whose sum is σ = 214134805764. Its totient is φ = 211971827536.

The previous prime is 213053316643. The next prime is 213053316659. The reversal of 213053316649 is 946613350312.

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 145642983424 + 67410333225 = 381632^2 + 259635^2 .

It is a cyclic number.

It is not a de Polignac number, because 213053316649 - 2²⁵ = 213019762217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213053316643) 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, 540744262 + ... + 540744655.

It is an arithmetic number, because the mean of its divisors is an integer number (53533701441).

Almost surely, 2^213053316649 is an apocalyptic number.

It is an amenable number.

213053316649 is a deficient number, since it is larger than the sum of its proper divisors (1081489115).

213053316649 is a wasteful number, since it uses less digits than its factorization.

213053316649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081489114.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 213053316649 in words is "two hundred thirteen billion, fifty-three million, three hundred sixteen thousand, six hundred forty-nine".