55051405 has 4 divisors (see below), whose sum is σ = 66061692. Its totient is φ = 44041120.

The previous prime is 55051391. The next prime is 55051427. The reversal of 55051405 is 50415055.

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 37124649 + 17926756 = 6093^2 + 4234^2 .

It is not a de Polignac number, because 55051405 - 2⁷ = 55051277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55051405.

It is a congruent 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, 5505136 + ... + 5505145.

It is an arithmetic number, because the mean of its divisors is an integer number (16515423).

Almost surely, 2^55051405 is an apocalyptic number.

It is an amenable number.

55051405 is a deficient number, since it is larger than the sum of its proper divisors (11010287).

55051405 is a wasteful number, since it uses less digits than its factorization.

55051405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11010286.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 55051405 is about 7419.6634020689. The cubic root of 55051405 is about 380.4136884389.

The spelling of 55051405 in words is "fifty-five million, fifty-one thousand, four hundred five".