23033721 has 8 divisors (see below), whose sum is σ = 31541824. Its totient is φ = 14940720.

The previous prime is 23033711. The next prime is 23033723. The reversal of 23033721 is 12733032.

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

It is a de Polignac number, because none of the positive numbers 2^k-23033721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23033723) 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, 103645 + ... + 103866.

It is an arithmetic number, because the mean of its divisors is an integer number (3942728).

Almost surely, 2^23033721 is an apocalyptic number.

It is an amenable number.

23033721 is a deficient number, since it is larger than the sum of its proper divisors (8508103).

23033721 is a wasteful number, since it uses less digits than its factorization.

23033721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207551.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 23033721 is about 4799.3458929317. The cubic root of 23033721 is about 284.5256127826.

Adding to 23033721 its reverse (12733032), we get a palindrome (35766753).

The spelling of 23033721 in words is "twenty-three million, thirty-three thousand, seven hundred twenty-one".