23217239 has 4 divisors (see below), whose sum is σ = 23231520. Its totient is φ = 23202960.

The previous prime is 23217211. The next prime is 23217247. The reversal of 23217239 is 93271232.

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 23217239 - 2¹⁶ = 23151703 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 (23217269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4334 + ... + 8075.

It is an arithmetic number, because the mean of its divisors is an integer number (5807880).

Almost surely, 2^23217239 is an apocalyptic number.

23217239 is a deficient number, since it is larger than the sum of its proper divisors (14281).

23217239 is a wasteful number, since it uses less digits than its factorization.

23217239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14280.

The product of its digits is 4536, while the sum is 29.

The square root of 23217239 is about 4818.4270254929. The cubic root of 23217239 is about 285.2792543460.

It can be divided in two parts, 232 and 17239, that added together give a palindrome (17471).

The spelling of 23217239 in words is "twenty-three million, two hundred seventeen thousand, two hundred thirty-nine".