43553123 has 4 divisors (see below), whose sum is σ = 43568160. Its totient is φ = 43538088.

The previous prime is 43553113. The next prime is 43553131. The reversal of 43553123 is 32135534.

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

It is a cyclic number.

It is not a de Polignac number, because 43553123 - 2¹⁰ = 43552099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43553092 and 43553101.

It is not an unprimeable number, because it can be changed into a prime (43553113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643 + ... + 9476.

It is an arithmetic number, because the mean of its divisors is an integer number (10892040).

Almost surely, 2^43553123 is an apocalyptic number.

43553123 is a deficient number, since it is larger than the sum of its proper divisors (15037).

43553123 is a wasteful number, since it uses less digits than its factorization.

43553123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15036.

The product of its digits is 5400, while the sum is 26.

The square root of 43553123 is about 6599.4789945874. The cubic root of 43553123 is about 351.8355890037.

Adding to 43553123 its reverse (32135534), we get a palindrome (75688657).

The spelling of 43553123 in words is "forty-three million, five hundred fifty-three thousand, one hundred twenty-three".