15680223 has 20 divisors (see below), whose sum is σ = 25227048. Its totient is φ = 9648720.

The previous prime is 15680207. The next prime is 15680243. The reversal of 15680223 is 32208651.

It is not a de Polignac number, because 15680223 - 2⁴ = 15680207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15680243) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6393 + ... + 8498.

Almost surely, 2^15680223 is an apocalyptic number.

15680223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

15680223 is a deficient number, since it is larger than the sum of its proper divisors (9546825).

15680223 is a wasteful number, since it uses less digits than its factorization.

15680223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14916 (or 14907 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 15680223 is about 3959.8261325467. The cubic root of 15680223 is about 250.2941763719.

Adding to 15680223 its reverse (32208651), we get a palindrome (47888874).

The spelling of 15680223 in words is "fifteen million, six hundred eighty thousand, two hundred twenty-three".