23030521 has 4 divisors (see below), whose sum is σ = 24031872. Its totient is φ = 22029172.

The previous prime is 23030519. The next prime is 23030537. The reversal of 23030521 is 12503032.

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 23030521 - 2¹ = 23030519 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 = 23030495 and 23030504.

It is not an unprimeable number, because it can be changed into a prime (23010521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500641 + ... + 500686.

It is an arithmetic number, because the mean of its divisors is an integer number (6007968).

Almost surely, 2^23030521 is an apocalyptic number.

It is an amenable number.

23030521 is a deficient number, since it is larger than the sum of its proper divisors (1001351).

23030521 is a wasteful number, since it uses less digits than its factorization.

23030521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001350.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 23030521 is about 4799.0125025884. The cubic root of 23030521 is about 284.5124360995.

Adding to 23030521 its reverse (12503032), we get a palindrome (35533553).

The spelling of 23030521 in words is "twenty-three million, thirty thousand, five hundred twenty-one".