13212235533 has 16 divisors (see below), whose sum is σ = 20138549760. Its totient is φ = 7547741616.

The previous prime is 13212235511. The next prime is 13212235537. The reversal of 13212235533 is 33553221231.

It is a happy number.

It is not a de Polignac number, because 13212235533 - 2¹⁰ = 13212234509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13212235533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212235537) 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, 9135 + ... + 162812.

It is an arithmetic number, because the mean of its divisors is an integer number (1258659360).

Almost surely, 2^13212235533 is an apocalyptic number.

It is an amenable number.

13212235533 is a deficient number, since it is larger than the sum of its proper divisors (6926314227).

13212235533 is a wasteful number, since it uses less digits than its factorization.

13212235533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175616.

The product of its digits is 16200, while the sum is 30.

Adding to 13212235533 its reverse (33553221231), we get a palindrome (46765456764).

The spelling of 13212235533 in words is "thirteen billion, two hundred twelve million, two hundred thirty-five thousand, five hundred thirty-three".