213053316645 has 32 divisors (see below), whose sum is σ = 386428694400. Its totient is φ = 99367375104.

The previous prime is 213053316643. The next prime is 213053316659. The reversal of 213053316645 is 546613350312.

It is not a de Polignac number, because 213053316645 - 2¹ = 213053316643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 28748430 + ... + 28755839.

It is an arithmetic number, because the mean of its divisors is an integer number (12075896700).

Almost surely, 2^213053316645 is an apocalyptic number.

It is an amenable number.

213053316645 is a deficient number, since it is larger than the sum of its proper divisors (173375377755).

213053316645 is a wasteful number, since it uses less digits than its factorization.

213053316645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57504309.

The product of its (nonzero) digits is 194400, while the sum is 39.

Adding to 213053316645 its reverse (546613350312), we get a palindrome (759666666957).

The spelling of 213053316645 in words is "two hundred thirteen billion, fifty-three million, three hundred sixteen thousand, six hundred forty-five".