43420551 has 8 divisors (see below), whose sum is σ = 58033920. Its totient is φ = 28877112.

The previous prime is 43420543. The next prime is 43420579. The reversal of 43420551 is 15502434.

43420551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43420551 - 2³ = 43420543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43420051) 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 7 ways as a sum of consecutive naturals, for example, 16015 + ... + 18528.

It is an arithmetic number, because the mean of its divisors is an integer number (7254240).

Almost surely, 2^43420551 is an apocalyptic number.

43420551 is a deficient number, since it is larger than the sum of its proper divisors (14613369).

43420551 is a wasteful number, since it uses less digits than its factorization.

43420551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34965.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 43420551 is about 6589.4272133472. The cubic root of 43420551 is about 351.4782403146.

Adding to 43420551 its reverse (15502434), we get a palindrome (58922985).

The spelling of 43420551 in words is "forty-three million, four hundred twenty thousand, five hundred fifty-one".