15609223 has 4 divisors (see below), whose sum is σ = 17839120. Its totient is φ = 13379328.

The previous prime is 15609211. The next prime is 15609287. The reversal of 15609223 is 32290651.

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 15609223 - 2¹³ = 15601031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15609191 and 15609200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15609023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114938 + ... + 1114951.

It is an arithmetic number, because the mean of its divisors is an integer number (4459780).

Almost surely, 2^15609223 is an apocalyptic number.

15609223 is a deficient number, since it is larger than the sum of its proper divisors (2229897).

15609223 is an equidigital number, since it uses as much as digits as its factorization.

15609223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229896.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 15609223 is about 3950.8509210042. The cubic root of 15609223 is about 249.9158276633.

Adding to 15609223 its reverse (32290651), we get a palindrome (47899874).

The spelling of 15609223 in words is "fifteen million, six hundred nine thousand, two hundred twenty-three".