23154321 has 4 divisors (see below), whose sum is σ = 30872432. Its totient is φ = 15436212.

The previous prime is 23154283. The next prime is 23154337. The reversal of 23154321 is 12345132.

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 23154321 - 2¹⁰ = 23153297 is a prime.

It is a super-2 number, since 2×23154321² = 1072245161942082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23154361) 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, 3859051 + ... + 3859056.

It is an arithmetic number, because the mean of its divisors is an integer number (7718108).

Almost surely, 2^23154321 is an apocalyptic number.

It is an amenable number.

23154321 is a deficient number, since it is larger than the sum of its proper divisors (7718111).

23154321 is an equidigital number, since it uses as much as digits as its factorization.

23154321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7718110.

The product of its digits is 720, while the sum is 21.

The square root of 23154321 is about 4811.8937020678. The cubic root of 23154321 is about 285.0213218889.

Adding to 23154321 its reverse (12345132), we get a palindrome (35499453).

The spelling of 23154321 in words is "twenty-three million, one hundred fifty-four thousand, three hundred twenty-one".