55872805 has 4 divisors (see below), whose sum is σ = 67047372. Its totient is φ = 44698240.

The previous prime is 55872799. The next prime is 55872809. The reversal of 55872805 is 50827855.

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 35070084 + 20802721 = 5922^2 + 4561^2 .

It is not a de Polignac number, because 55872805 - 2¹¹ = 55870757 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 (55872809) 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, 5587276 + ... + 5587285.

It is an arithmetic number, because the mean of its divisors is an integer number (16761843).

Almost surely, 2^55872805 is an apocalyptic number.

It is an amenable number.

55872805 is a deficient number, since it is larger than the sum of its proper divisors (11174567).

55872805 is a wasteful number, since it uses less digits than its factorization.

55872805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11174566.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 55872805 is about 7474.8113688574. The cubic root of 55872805 is about 382.2963559214.

The spelling of 55872805 in words is "fifty-five million, eight hundred seventy-two thousand, eight hundred five".