16433320231 has 4 divisors (see below), whose sum is σ = 16447004464. Its totient is φ = 16419636000.

The previous prime is 16433320207. The next prime is 16433320261. The reversal of 16433320231 is 13202333461.

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

It is a cyclic number.

It is not a de Polignac number, because 16433320231 - 2⁵ = 16433320199 is a prime.

It is a super-2 number, since 2×16433320231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16433320231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16433320261) 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, 6840315 + ... + 6842716.

It is an arithmetic number, because the mean of its divisors is an integer number (4111751116).

Almost surely, 2^16433320231 is an apocalyptic number.

16433320231 is a deficient number, since it is larger than the sum of its proper divisors (13684233).

16433320231 is a wasteful number, since it uses less digits than its factorization.

16433320231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13684232.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 16433320231 its reverse (13202333461), we get a palindrome (29635653692).

The spelling of 16433320231 in words is "sixteen billion, four hundred thirty-three million, three hundred twenty thousand, two hundred thirty-one".