213053316646 has 16 divisors (see below), whose sum is σ = 338391535680. Its totient is φ = 100256609920.

The previous prime is 213053316643. The next prime is 213053316659. The reversal of 213053316646 is 646613350312.

It is a junction number, because it is equal to n+sod(n) for n = 213053316599 and 213053316608.

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 7 ways as a sum of consecutive naturals, for example, 934611 + ... + 1140001.

It is an arithmetic number, because the mean of its divisors is an integer number (21149470980).

Almost surely, 2^213053316646 is an apocalyptic number.

213053316646 is a deficient number, since it is larger than the sum of its proper divisors (125338219034).

213053316646 is a wasteful number, since it uses less digits than its factorization.

213053316646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235919.

The product of its (nonzero) digits is 233280, while the sum is 40.

Adding to 213053316646 its reverse (646613350312), we get a palindrome (859666666958).

The spelling of 213053316646 in words is "two hundred thirteen billion, fifty-three million, three hundred sixteen thousand, six hundred forty-six".