23215647 has 32 divisors (see below), whose sum is σ = 38359552. Its totient is φ = 12161664.

The previous prime is 23215597. The next prime is 23215667. The reversal of 23215647 is 74651232.

It is not a de Polignac number, because 23215647 - 2¹¹ = 23213599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23215667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75468 + ... + 75774.

It is an arithmetic number, because the mean of its divisors is an integer number (1198736).

Almost surely, 2^23215647 is an apocalyptic number.

23215647 is a deficient number, since it is larger than the sum of its proper divisors (15143905).

23215647 is a wasteful number, since it uses less digits than its factorization.

23215647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607.

The product of its digits is 10080, while the sum is 30.

The square root of 23215647 is about 4818.2618235210. The cubic root of 23215647 is about 285.2727336891.

Adding to 23215647 its reverse (74651232), we get a palindrome (97866879).

The spelling of 23215647 in words is "twenty-three million, two hundred fifteen thousand, six hundred forty-seven".