23121343 has 16 divisors (see below), whose sum is σ = 28111104. Its totient is φ = 18564480.

The previous prime is 23121341. The next prime is 23121349. The reversal of 23121343 is 34312132.

It is a cyclic number.

It is not a de Polignac number, because 23121343 - 2¹ = 23121341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23121343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121341) 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, 39096 + ... + 39682.

It is an arithmetic number, because the mean of its divisors is an integer number (1756944).

Almost surely, 2^23121343 is an apocalyptic number.

23121343 is a deficient number, since it is larger than the sum of its proper divisors (4989761).

23121343 is a wasteful number, since it uses less digits than its factorization.

23121343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942.

The product of its digits is 432, while the sum is 19.

The square root of 23121343 is about 4808.4657636298. The cubic root of 23121343 is about 284.8859418429.

Adding to 23121343 its reverse (34312132), we get a palindrome (57433475).

It can be divided in two parts, 2312 and 1343, that added together give a triangular number (3655 = T₈₅).

The spelling of 23121343 in words is "twenty-three million, one hundred twenty-one thousand, three hundred forty-three".