23533353221 has 8 divisors (see below), whose sum is σ = 27467500800. Its totient is φ = 19742265648.

The previous prime is 23533353199. The next prime is 23533353223. The reversal of 23533353221 is 12235333532.

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

It is not a de Polignac number, because 23533353221 - 2⁶ = 23533353157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23533353223) 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, 35764646 + ... + 35765303.

It is an arithmetic number, because the mean of its divisors is an integer number (3433437600).

Almost surely, 2^23533353221 is an apocalyptic number.

It is an amenable number.

23533353221 is a deficient number, since it is larger than the sum of its proper divisors (3934147579).

23533353221 is an equidigital number, since it uses as much as digits as its factorization.

23533353221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71530003.

The product of its digits is 48600, while the sum is 32.

Adding to 23533353221 its reverse (12235333532), we get a palindrome (35768686753).

The spelling of 23533353221 in words is "twenty-three billion, five hundred thirty-three million, three hundred fifty-three thousand, two hundred twenty-one".