23035521 has 4 divisors (see below), whose sum is σ = 30714032. Its totient is φ = 15357012.

The previous prime is 23035517. The next prime is 23035553. The reversal of 23035521 is 12553032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23035521 - 2² = 23035517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23035501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3839251 + ... + 3839256.

It is an arithmetic number, because the mean of its divisors is an integer number (7678508).

Almost surely, 2^23035521 is an apocalyptic number.

It is an amenable number.

23035521 is a deficient number, since it is larger than the sum of its proper divisors (7678511).

23035521 is an equidigital number, since it uses as much as digits as its factorization.

23035521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7678510.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 23035521 is about 4799.5334148227. The cubic root of 23035521 is about 284.5330241305.

Adding to 23035521 its reverse (12553032), we get a palindrome (35588553).

The spelling of 23035521 in words is "twenty-three million, thirty-five thousand, five hundred twenty-one".