23520261 has 8 divisors (see below), whose sum is σ = 31445920. Its totient is φ = 15637392.

The previous prime is 23520253. The next prime is 23520293. The reversal of 23520261 is 16202532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23520261 - 2³ = 23520253 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 (23520221) 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 7 ways as a sum of consecutive naturals, for example, 9391 + ... + 11628.

It is an arithmetic number, because the mean of its divisors is an integer number (3930740).

Almost surely, 2^23520261 is an apocalyptic number.

It is an amenable number.

23520261 is a deficient number, since it is larger than the sum of its proper divisors (7925659).

23520261 is a wasteful number, since it uses less digits than its factorization.

23520261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21395.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 23520261 is about 4849.7691697647. The cubic root of 23520261 is about 286.5150100716.

Adding to 23520261 its reverse (16202532), we get a palindrome (39722793).

The spelling of 23520261 in words is "twenty-three million, five hundred twenty thousand, two hundred sixty-one".