23203232221 has 16 divisors (see below), whose sum is σ = 26478649008. Its totient is φ = 20142720000.

The previous prime is 23203232219. The next prime is 23203232303. The reversal of 23203232221 is 12223230232.

It can be written as a sum of positive squares in 8 ways, for example, as 1963376100 + 21239856121 = 44310^2 + 145739^2 .

It is not a de Polignac number, because 23203232221 - 2¹ = 23203232219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23203232192 and 23203232201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23203232201) 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 15 ways as a sum of consecutive naturals, for example, 247171 + ... + 327871.

It is an arithmetic number, because the mean of its divisors is an integer number (1654915563).

Almost surely, 2^23203232221 is an apocalyptic number.

It is an amenable number.

23203232221 is a deficient number, since it is larger than the sum of its proper divisors (3275416787).

23203232221 is a wasteful number, since it uses less digits than its factorization.

23203232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82032.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 23203232221 its reverse (12223230232), we get a palindrome (35426462453).

The spelling of 23203232221 in words is "twenty-three billion, two hundred three million, two hundred thirty-two thousand, two hundred twenty-one".