16623256231 has 2 divisors, whose sum is σ = 16623256232. Its totient is φ = 16623256230.

The previous prime is 16623256219. The next prime is 16623256261. The reversal of 16623256231 is 13265232661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16623256231 - 2¹³ = 16623248039 is a prime.

It is a super-2 number, since 2×16623256231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16623256261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8311628115 + 8311628116.

It is an arithmetic number, because the mean of its divisors is an integer number (8311628116).

Almost surely, 2^16623256231 is an apocalyptic number.

16623256231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16623256231 is an equidigital number, since it uses as much as digits as its factorization.

16623256231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 37.

Adding to 16623256231 its reverse (13265232661), we get a palindrome (29888488892).

The spelling of 16623256231 in words is "sixteen billion, six hundred twenty-three million, two hundred fifty-six thousand, two hundred thirty-one".