43551253243 has 4 divisors (see below), whose sum is σ = 44164651248. Its totient is φ = 42937855240.

The previous prime is 43551253217. The next prime is 43551253253. The reversal of 43551253243 is 34235215534.

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 43551253243 - 2¹⁷ = 43551122171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43551253253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306698896 + ... + 306699037.

It is an arithmetic number, because the mean of its divisors is an integer number (11041162812).

Almost surely, 2^43551253243 is an apocalyptic number.

43551253243 is a deficient number, since it is larger than the sum of its proper divisors (613398005).

43551253243 is an equidigital number, since it uses as much as digits as its factorization.

43551253243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613398004.

The product of its digits is 216000, while the sum is 37.

Adding to 43551253243 its reverse (34235215534), we get a palindrome (77786468777).

The spelling of 43551253243 in words is "forty-three billion, five hundred fifty-one million, two hundred fifty-three thousand, two hundred forty-three".