15643232223 has 16 divisors (see below), whose sum is σ = 21067028736. Its totient is φ = 10324195200.

The previous prime is 15643232219. The next prime is 15643232243. The reversal of 15643232223 is 32223234651.

It is not a de Polignac number, because 15643232223 - 2² = 15643232219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15643232243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1245511 + ... + 1258007.

It is an arithmetic number, because the mean of its divisors is an integer number (1316689296).

Almost surely, 2^15643232223 is an apocalyptic number.

15643232223 is a deficient number, since it is larger than the sum of its proper divisors (5423796513).

15643232223 is a wasteful number, since it uses less digits than its factorization.

15643232223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16654.

The product of its digits is 51840, while the sum is 33.

Adding to 15643232223 its reverse (32223234651), we get a palindrome (47866466874).

The spelling of 15643232223 in words is "fifteen billion, six hundred forty-three million, two hundred thirty-two thousand, two hundred twenty-three".