23242581221 has 4 divisors (see below), whose sum is σ = 23284309932. Its totient is φ = 23200852512.

The previous prime is 23242581209. The next prime is 23242581223. The reversal of 23242581221 is 12218524232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11747524996 + 11495056225 = 108386^2 + 107215^2 .

It is a cyclic number.

It is not a de Polignac number, because 23242581221 - 2¹⁸ = 23242319077 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 (23242581223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20863520 + ... + 20864633.

It is an arithmetic number, because the mean of its divisors is an integer number (5821077483).

Almost surely, 2^23242581221 is an apocalyptic number.

It is an amenable number.

23242581221 is a deficient number, since it is larger than the sum of its proper divisors (41728711).

23242581221 is an equidigital number, since it uses as much as digits as its factorization.

23242581221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41728710.

The product of its digits is 15360, while the sum is 32.

The spelling of 23242581221 in words is "twenty-three billion, two hundred forty-two million, five hundred eighty-one thousand, two hundred twenty-one".