55311305 has 16 divisors (see below), whose sum is σ = 75976704. Its totient is φ = 37867200.

The previous prime is 55311301. The next prime is 55311307. The reversal of 55311305 is 50311355.

It is not a de Polignac number, because 55311305 - 2² = 55311301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55311301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39599 + ... + 40971.

It is an arithmetic number, because the mean of its divisors is an integer number (4748544).

Almost surely, 2^55311305 is an apocalyptic number.

It is an amenable number.

55311305 is a deficient number, since it is larger than the sum of its proper divisors (20665399).

55311305 is a wasteful number, since it uses less digits than its factorization.

55311305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 55311305 is about 7437.1570509167. The cubic root of 55311305 is about 381.0113984966.

The spelling of 55311305 in words is "fifty-five million, three hundred eleven thousand, three hundred five".