55003805 has 4 divisors (see below), whose sum is σ = 66004572. Its totient is φ = 44003040.

The previous prime is 55003801. The next prime is 55003811. The reversal of 55003805 is 50830055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50830055 = 5 ⋅10166011.

It can be written as a sum of positive squares in 2 ways, for example, as 13039321 + 41964484 = 3611^2 + 6478^2 .

It is not a de Polignac number, because 55003805 - 2² = 55003801 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 (55003801) 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, 5500376 + ... + 5500385.

It is an arithmetic number, because the mean of its divisors is an integer number (16501143).

Almost surely, 2^55003805 is an apocalyptic number.

It is an amenable number.

55003805 is a deficient number, since it is larger than the sum of its proper divisors (11000767).

55003805 is a wasteful number, since it uses less digits than its factorization.

55003805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000766.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 55003805 is about 7416.4550157066. The cubic root of 55003805 is about 380.3040157128.

The spelling of 55003805 in words is "fifty-five million, three thousand, eight hundred five".