213662631473 has 2 divisors, whose sum is σ = 213662631474. Its totient is φ = 213662631472.

The previous prime is 213662631451. The next prime is 213662631503. The reversal of 213662631473 is 374136266312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207951504289 + 5711127184 = 456017^2 + 75572^2 .

It is a cyclic number.

It is not a de Polignac number, because 213662631473 - 2²⁸ = 213394196017 is a prime.

It is not a weakly prime, because it can be changed into another prime (213662631443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106831315736 + 106831315737.

It is an arithmetic number, because the mean of its divisors is an integer number (106831315737).

Almost surely, 2^213662631473 is an apocalyptic number.

It is an amenable number.

213662631473 is a deficient number, since it is larger than the sum of its proper divisors (1).

213662631473 is an equidigital number, since it uses as much as digits as its factorization.

213662631473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 44.

Adding to 213662631473 its reverse (374136266312), we get a palindrome (587798897785).

The spelling of 213662631473 in words is "two hundred thirteen billion, six hundred sixty-two million, six hundred thirty-one thousand, four hundred seventy-three".