23140321 has 4 divisors (see below), whose sum is σ = 23678512. Its totient is φ = 22602132.

The previous prime is 23140319. The next prime is 23140357. The reversal of 23140321 is 12304132.

It is a happy number.

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 23140321 - 2¹ = 23140319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23140295 and 23140304.

It is not an unprimeable number, because it can be changed into a prime (23140721) 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, 269031 + ... + 269116.

It is an arithmetic number, because the mean of its divisors is an integer number (5919628).

Almost surely, 2^23140321 is an apocalyptic number.

It is an amenable number.

23140321 is a deficient number, since it is larger than the sum of its proper divisors (538191).

23140321 is an equidigital number, since it uses as much as digits as its factorization.

23140321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538190.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 23140321 is about 4810.4387533779. The cubic root of 23140321 is about 284.9638653274.

Adding to 23140321 its reverse (12304132), we get a palindrome (35444453).

The spelling of 23140321 in words is "twenty-three million, one hundred forty thousand, three hundred twenty-one".