23241521 has 4 divisors (see below), whose sum is σ = 23559972. Its totient is φ = 22923072.

The previous prime is 23241509. The next prime is 23241527. The reversal of 23241521 is 12514232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9991921 + 13249600 = 3161^2 + 3640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23241521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23241493 and 23241502.

It is not an unprimeable number, because it can be changed into a prime (23241527) 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, 159116 + ... + 159261.

It is an arithmetic number, because the mean of its divisors is an integer number (5889993).

Almost surely, 2^23241521 is an apocalyptic number.

It is an amenable number.

23241521 is a deficient number, since it is larger than the sum of its proper divisors (318451).

23241521 is an equidigital number, since it uses as much as digits as its factorization.

23241521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318450.

The product of its digits is 480, while the sum is 20.

The square root of 23241521 is about 4820.9460689786. The cubic root of 23241521 is about 285.3786738235.

Adding to 23241521 its reverse (12514232), we get a palindrome (35755753).

The spelling of 23241521 in words is "twenty-three million, two hundred forty-one thousand, five hundred twenty-one".