55012805 has 4 divisors (see below), whose sum is σ = 66015372. Its totient is φ = 44010240.

The previous prime is 55012787. The next prime is 55012813. The reversal of 55012805 is 50821055.

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 10510564 + 44502241 = 3242^2 + 6671^2 .

It is not a de Polignac number, because 55012805 - 2⁸ = 55012549 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 3 ways as a sum of consecutive naturals, for example, 5501276 + ... + 5501285.

It is an arithmetic number, because the mean of its divisors is an integer number (16503843).

Almost surely, 2^55012805 is an apocalyptic number.

It is an amenable number.

55012805 is a deficient number, since it is larger than the sum of its proper divisors (11002567).

55012805 is a wasteful number, since it uses less digits than its factorization.

55012805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11002566.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 55012805 is about 7417.0617497767. The cubic root of 55012805 is about 380.3247570019.

Adding to 55012805 its product of nonzero digits (2000), we get a triangular number (55014805 = T₁₀₄₈₉).

The spelling of 55012805 in words is "fifty-five million, twelve thousand, eight hundred five".