16423143217 has 8 divisors (see below), whose sum is σ = 17755284456. Its totient is φ = 15100833792.

The previous prime is 16423143197. The next prime is 16423143227. The reversal of 16423143217 is 71234132461.

It can be written as a sum of positive squares in 4 ways, for example, as 4041907776 + 12381235441 = 63576^2 + 111271^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16423143217 - 2⁷ = 16423143089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16423143227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2454478 + ... + 2461159.

It is an arithmetic number, because the mean of its divisors is an integer number (2219410557).

Almost surely, 2^16423143217 is an apocalyptic number.

It is an amenable number.

16423143217 is a deficient number, since it is larger than the sum of its proper divisors (1332141239).

16423143217 is a wasteful number, since it uses less digits than its factorization.

16423143217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4915907.

The product of its digits is 24192, while the sum is 34.

Adding to 16423143217 its reverse (71234132461), we get a palindrome (87657275678).

The spelling of 16423143217 in words is "sixteen billion, four hundred twenty-three million, one hundred forty-three thousand, two hundred seventeen".