213220344433 has 4 divisors (see below), whose sum is σ = 213221671920. Its totient is φ = 213219016948.

The previous prime is 213220344397. The next prime is 213220344473. The reversal of 213220344433 is 334443022312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213220344433 - 2²⁵ = 213186790001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213220344395 and 213220344404.

It is not an unprimeable number, because it can be changed into a prime (213220344473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383323 + ... + 757216.

It is an arithmetic number, because the mean of its divisors is an integer number (53305417980).

Almost surely, 2^213220344433 is an apocalyptic number.

It is an amenable number.

213220344433 is a deficient number, since it is larger than the sum of its proper divisors (1327487).

213220344433 is a wasteful number, since it uses less digits than its factorization.

213220344433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327486.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 213220344433 its reverse (334443022312), we get a palindrome (547663366745).

The spelling of 213220344433 in words is "two hundred thirteen billion, two hundred twenty million, three hundred forty-four thousand, four hundred thirty-three".