23452521 has 4 divisors (see below), whose sum is σ = 31270032. Its totient is φ = 15635012.

The previous prime is 23452519. The next prime is 23452529. The reversal of 23452521 is 12525432.

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 a cyclic number.

It is not a de Polignac number, because 23452521 - 2¹ = 23452519 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 23452491 and 23452500.

It is not an unprimeable number, because it can be changed into a prime (23452529) 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, 3908751 + ... + 3908756.

It is an arithmetic number, because the mean of its divisors is an integer number (7817508).

Almost surely, 2^23452521 is an apocalyptic number.

It is an amenable number.

23452521 is a deficient number, since it is larger than the sum of its proper divisors (7817511).

23452521 is an equidigital number, since it uses as much as digits as its factorization.

23452521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7817510.

The product of its digits is 2400, while the sum is 24.

The square root of 23452521 is about 4842.7802964826. The cubic root of 23452521 is about 286.2396844804.

Adding to 23452521 its reverse (12525432), we get a palindrome (35977953).

The spelling of 23452521 in words is "twenty-three million, four hundred fifty-two thousand, five hundred twenty-one".