23213647 has 4 divisors (see below), whose sum is σ = 24222960. Its totient is φ = 22204336.

The previous prime is 23213639. The next prime is 23213651. The reversal of 23213647 is 74631232.

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 23213647 - 2³ = 23213639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504622 + ... + 504667.

It is an arithmetic number, because the mean of its divisors is an integer number (6055740).

Almost surely, 2^23213647 is an apocalyptic number.

23213647 is a deficient number, since it is larger than the sum of its proper divisors (1009313).

23213647 is a wasteful number, since it uses less digits than its factorization.

23213647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009312.

The product of its digits is 6048, while the sum is 28.

The square root of 23213647 is about 4818.0542753273. The cubic root of 23213647 is about 285.2645414864.

Adding to 23213647 its reverse (74631232), we get a palindrome (97844879).

The spelling of 23213647 in words is "twenty-three million, two hundred thirteen thousand, six hundred forty-seven".