23550521 has 4 divisors (see below), whose sum is σ = 23564544. Its totient is φ = 23536500.

The previous prime is 23550511. The next prime is 23550529. The reversal of 23550521 is 12505532.

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 23550521 - 2¹⁰ = 23549497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23550529) 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, 4085 + ... + 7986.

It is an arithmetic number, because the mean of its divisors is an integer number (5891136).

Almost surely, 2^23550521 is an apocalyptic number.

It is an amenable number.

23550521 is a deficient number, since it is larger than the sum of its proper divisors (14023).

23550521 is a wasteful number, since it uses less digits than its factorization.

23550521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14022.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 23550521 is about 4852.8879030944. The cubic root of 23550521 is about 286.6378294110.

The spelling of 23550521 in words is "twenty-three million, five hundred fifty thousand, five hundred twenty-one".