55406305 has 4 divisors (see below), whose sum is σ = 66487572. Its totient is φ = 44325040.

The previous prime is 55406297. The next prime is 55406347. The reversal of 55406305 is 50360455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17164449 + 38241856 = 4143^2 + 6184^2 .

It is not a de Polignac number, because 55406305 - 2³ = 55406297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5540626 + ... + 5540635.

It is an arithmetic number, because the mean of its divisors is an integer number (16621893).

Almost surely, 2^55406305 is an apocalyptic number.

It is an amenable number.

55406305 is a deficient number, since it is larger than the sum of its proper divisors (11081267).

55406305 is a wasteful number, since it uses less digits than its factorization.

55406305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11081266.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 55406305 is about 7443.5411599587. The cubic root of 55406305 is about 381.2294092615.

The spelling of 55406305 in words is "fifty-five million, four hundred six thousand, three hundred five".