55720043 has 4 divisors (see below), whose sum is σ = 56425440. Its totient is φ = 55014648.

The previous prime is 55720003. The next prime is 55720061. The reversal of 55720043 is 34002755.

55720043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55720043 - 2¹⁰ = 55719019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55719994 and 55720021.

It is not an unprimeable number, because it can be changed into a prime (55720003) 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 3 ways as a sum of consecutive naturals, for example, 352580 + ... + 352737.

It is an arithmetic number, because the mean of its divisors is an integer number (14106360).

Almost surely, 2^55720043 is an apocalyptic number.

55720043 is a deficient number, since it is larger than the sum of its proper divisors (705397).

55720043 is an equidigital number, since it uses as much as digits as its factorization.

55720043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705396.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 55720043 is about 7464.5859228761. The cubic root of 55720043 is about 381.9476253770.

Adding to 55720043 its reverse (34002755), we get a palindrome (89722798).

The spelling of 55720043 in words is "fifty-five million, seven hundred twenty thousand, forty-three".