213231004443 has 16 divisors (see below), whose sum is σ = 316219184640. Its totient is φ = 142009372872.

The previous prime is 213231004433. The next prime is 213231004499. The reversal of 213231004443 is 344400132312.

213231004443 is a `hidden beast` number, since 213 + 2 + 3 + 1 + 0 + 0 + 4 + 443 = 666.

It is not a de Polignac number, because 213231004443 - 2⁵ = 213231004411 is a prime.

It is a super-2 number, since 2×213231004443² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (213231004433) 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, 3990471 + ... + 4043552.

It is an arithmetic number, because the mean of its divisors is an integer number (19763699040).

Almost surely, 2^213231004443 is an apocalyptic number.

213231004443 is a deficient number, since it is larger than the sum of its proper divisors (102988180197).

213231004443 is an equidigital number, since it uses as much as digits as its factorization.

213231004443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8035015 (or 8035009 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 213231004443 its reverse (344400132312), we get a palindrome (557631136755).

The spelling of 213231004443 in words is "two hundred thirteen billion, two hundred thirty-one million, four thousand, four hundred forty-three".