23280321 has 4 divisors (see below), whose sum is σ = 31040432. Its totient is φ = 15520212.

The previous prime is 23280317. The next prime is 23280331. The reversal of 23280321 is 12308232.

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 23280321 - 2² = 23280317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23280331) 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, 3880051 + ... + 3880056.

It is an arithmetic number, because the mean of its divisors is an integer number (7760108).

Almost surely, 2^23280321 is an apocalyptic number.

It is an amenable number.

23280321 is a deficient number, since it is larger than the sum of its proper divisors (7760111).

23280321 is an equidigital number, since it uses as much as digits as its factorization.

23280321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7760110.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 23280321 is about 4824.9684973065. The cubic root of 23280321 is about 285.5373917286.

Adding to 23280321 its reverse (12308232), we get a palindrome (35588553).

The spelling of 23280321 in words is "twenty-three million, two hundred eighty thousand, three hundred twenty-one".