16123431217 has 8 divisors (see below), whose sum is σ = 16978757760. Its totient is φ = 15268777200.

The previous prime is 16123431197. The next prime is 16123431253. The reversal of 16123431217 is 71213432161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16123431217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16123431257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118534 + ... + 215167.

It is an arithmetic number, because the mean of its divisors is an integer number (2122344720).

Almost surely, 2^16123431217 is an apocalyptic number.

It is an amenable number.

16123431217 is a deficient number, since it is larger than the sum of its proper divisors (855326543).

16123431217 is a wasteful number, since it uses less digits than its factorization.

16123431217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336263.

The product of its digits is 6048, while the sum is 31.

Adding to 16123431217 its reverse (71213432161), we get a palindrome (87336863378).

The spelling of 16123431217 in words is "sixteen billion, one hundred twenty-three million, four hundred thirty-one thousand, two hundred seventeen".