55405343 has 4 divisors (see below), whose sum is σ = 63320400. Its totient is φ = 47490288.

The previous prime is 55405327. The next prime is 55405379. The reversal of 55405343 is 34350455.

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 55405343 - 2⁴ = 55405327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55405313) 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, 3957518 + ... + 3957531.

It is an arithmetic number, because the mean of its divisors is an integer number (15830100).

Almost surely, 2^55405343 is an apocalyptic number.

55405343 is a deficient number, since it is larger than the sum of its proper divisors (7915057).

55405343 is an equidigital number, since it uses as much as digits as its factorization.

55405343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7915056.

The product of its (nonzero) digits is 18000, while the sum is 29.

The square root of 55405343 is about 7443.4765398972. The cubic root of 55405343 is about 381.2272028651.

Adding to 55405343 its reverse (34350455), we get a palindrome (89755798).

The spelling of 55405343 in words is "fifty-five million, four hundred five thousand, three hundred forty-three".