23144233221 has 16 divisors (see below), whose sum is σ = 34321376320. Its totient is φ = 15414358320.

The previous prime is 23144233219. The next prime is 23144233223. The reversal of 23144233221 is 12233244132.

23144233221 is a `hidden beast` number, since 2 + 3 + 14 + 423 + 3 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (23144233219) and next prime (23144233223).

It is not a de Polignac number, because 23144233221 - 2¹ = 23144233219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23144233223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392215 + ... + 447348.

It is an arithmetic number, because the mean of its divisors is an integer number (2145086020).

Almost surely, 2^23144233221 is an apocalyptic number.

It is an amenable number.

23144233221 is a deficient number, since it is larger than the sum of its proper divisors (11177143099).

23144233221 is a wasteful number, since it uses less digits than its factorization.

23144233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840593 (or 840587 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 23144233221 its reverse (12233244132), we get a palindrome (35377477353).

The spelling of 23144233221 in words is "twenty-three billion, one hundred forty-four million, two hundred thirty-three thousand, two hundred twenty-one".