23234721 has 8 divisors (see below), whose sum is σ = 31254240. Its totient is φ = 15352512.

The previous prime is 23234711. The next prime is 23234759. The reversal of 23234721 is 12743232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23234721 - 2⁵ = 23234689 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 = 23234691 and 23234700.

It is not an unprimeable number, because it can be changed into a prime (23234711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33931 + ... + 34608.

It is an arithmetic number, because the mean of its divisors is an integer number (3906780).

Almost surely, 2^23234721 is an apocalyptic number.

It is an amenable number.

23234721 is a deficient number, since it is larger than the sum of its proper divisors (8019519).

23234721 is a wasteful number, since it uses less digits than its factorization.

23234721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68655.

The product of its digits is 2016, while the sum is 24.

The square root of 23234721 is about 4820.2407616218. The cubic root of 23234721 is about 285.3508390952.

Adding to 23234721 its reverse (12743232), we get a palindrome (35977953).

The spelling of 23234721 in words is "twenty-three million, two hundred thirty-four thousand, seven hundred twenty-one".