213221311393 has 16 divisors (see below), whose sum is σ = 216056379600. Its totient is φ = 210401740800.

The previous prime is 213221311361. The next prime is 213221311441. The reversal of 213221311393 is 393113122312.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8367309729 + 204854001664 = 91473^2 + 452608^2 .

It is a cyclic number.

It is not a de Polignac number, because 213221311393 - 2⁵ = 213221311361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213221311333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40742905 + ... + 40748137.

It is an arithmetic number, because the mean of its divisors is an integer number (13503523725).

Almost surely, 2^213221311393 is an apocalyptic number.

It is an amenable number.

213221311393 is a deficient number, since it is larger than the sum of its proper divisors (2835068207).

213221311393 is a wasteful number, since it uses less digits than its factorization.

213221311393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6612.

The product of its digits is 5832, while the sum is 31.

The spelling of 213221311393 in words is "two hundred thirteen billion, two hundred twenty-one million, three hundred eleven thousand, three hundred ninety-three".