43045551 has 6 divisors (see below), whose sum is σ = 62176920. Its totient is φ = 28697028.

The previous prime is 43045511. The next prime is 43045553. The reversal of 43045551 is 15554034.

43045551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43045551 - 2¹⁷ = 42914479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43045553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2391411 + ... + 2391428.

It is an arithmetic number, because the mean of its divisors is an integer number (10362820).

Almost surely, 2^43045551 is an apocalyptic number.

43045551 is a deficient number, since it is larger than the sum of its proper divisors (19131369).

43045551 is a wasteful number, since it uses less digits than its factorization.

43045551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782845 (or 4782842 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 43045551 is about 6560.9108361568. The cubic root of 43045551 is about 350.4634703549.

Adding to 43045551 its reverse (15554034), we get a palindrome (58599585).

The spelling of 43045551 in words is "forty-three million, forty-five thousand, five hundred fifty-one".