23130321 has 4 divisors (see below), whose sum is σ = 30840432. Its totient is φ = 15420212.

The previous prime is 23130287. The next prime is 23130323. The reversal of 23130321 is 12303132.

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 23130321 - 2⁷ = 23130193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23130321.

It is not an unprimeable number, because it can be changed into a prime (23130323) 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, 3855051 + ... + 3855056.

It is an arithmetic number, because the mean of its divisors is an integer number (7710108).

Almost surely, 2^23130321 is an apocalyptic number.

It is an amenable number.

23130321 is a deficient number, since it is larger than the sum of its proper divisors (7710111).

23130321 is an equidigital number, since it uses as much as digits as its factorization.

23130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7710110.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 23130321 is about 4809.3992348317. The cubic root of 23130321 is about 284.9228107365.

Adding to 23130321 its reverse (12303132), we get a palindrome (35433453).

The spelling of 23130321 in words is "twenty-three million, one hundred thirty thousand, three hundred twenty-one".