16311021324533 has 4 divisors (see below), whose sum is σ = 17565715272588. Its totient is φ = 15056327376480.

The previous prime is 16311021324419. The next prime is 16311021324551. The reversal of 16311021324533 is 33542312011361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3133264630609 + 13177756693924 = 1770103^2 + 3630118^2 .

It is not a de Polignac number, because 16311021324533 - 2¹⁸ = 16311021062389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16311021324493 and 16311021324502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16311021320533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627346974008 + ... + 627346974033.

It is an arithmetic number, because the mean of its divisors is an integer number (4391428818147).

Almost surely, 2^{16311021324533} is an apocalyptic number.

16311021324533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16311021324533 is a deficient number, since it is larger than the sum of its proper divisors (1254693948055).

16311021324533 is a wasteful number, since it uses less digits than its factorization.

16311021324533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254693948054.

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 16311021324533 its reverse (33542312011361), we get a palindrome (49853333335894).

The spelling of 16311021324533 in words is "sixteen trillion, three hundred eleven billion, twenty-one million, three hundred twenty-four thousand, five hundred thirty-three".