43245523 has 4 divisors (see below), whose sum is σ = 43954528. Its totient is φ = 42536520.

The previous prime is 43245437. The next prime is 43245533. The reversal of 43245523 is 32554234.

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

It is not a de Polignac number, because 43245523 - 2²⁵ = 9691091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43245491 and 43245500.

It is not an unprimeable number, because it can be changed into a prime (43245533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354411 + ... + 354532.

It is an arithmetic number, because the mean of its divisors is an integer number (10988632).

Almost surely, 2^43245523 is an apocalyptic number.

43245523 is a deficient number, since it is larger than the sum of its proper divisors (709005).

43245523 is an equidigital number, since it uses as much as digits as its factorization.

43245523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709004.

The product of its digits is 14400, while the sum is 28.

The square root of 43245523 is about 6576.1328301670. The cubic root of 43245523 is about 351.0053353734.

Adding to 43245523 its reverse (32554234), we get a palindrome (75799757).

The spelling of 43245523 in words is "forty-three million, two hundred forty-five thousand, five hundred twenty-three".