55405205 has 8 divisors (see below), whose sum is σ = 67423104. Its totient is φ = 43699600.

The previous prime is 55405157. The next prime is 55405223. The reversal of 55405205 is 50250455.

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

It is a de Polignac number, because none of the positive numbers 2^k-55405205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77681 + ... + 78390.

It is an arithmetic number, because the mean of its divisors is an integer number (8427888).

Almost surely, 2^55405205 is an apocalyptic number.

It is an amenable number.

55405205 is a deficient number, since it is larger than the sum of its proper divisors (12017899).

55405205 is a wasteful number, since it uses less digits than its factorization.

55405205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156147.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 55405205 is about 7443.4672700295. The cubic root of 55405205 is about 381.2268863529.

The spelling of 55405205 in words is "fifty-five million, four hundred five thousand, two hundred five".