16464430231 has 4 divisors (see below), whose sum is σ = 16775079912. Its totient is φ = 16153780552.

The previous prime is 16464430223. The next prime is 16464430253. The reversal of 16464430231 is 13203446461.

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 16464430231 - 2³ = 16464430223 is a prime.

It is a super-2 number, since 2×16464430231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16464430291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155324761 + ... + 155324866.

It is an arithmetic number, because the mean of its divisors is an integer number (4193769978).

Almost surely, 2^16464430231 is an apocalyptic number.

16464430231 is a deficient number, since it is larger than the sum of its proper divisors (310649681).

16464430231 is an equidigital number, since it uses as much as digits as its factorization.

16464430231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310649680.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 16464430231 its reverse (13203446461), we get a palindrome (29667876692).

The spelling of 16464430231 in words is "sixteen billion, four hundred sixty-four million, four hundred thirty thousand, two hundred thirty-one".