55307805 has 16 divisors (see below), whose sum is σ = 101134464. Its totient is φ = 25283520.

The previous prime is 55307789. The next prime is 55307809. The reversal of 55307805 is 50870355.

It is not a de Polignac number, because 55307805 - 2⁴ = 55307789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55307809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263266 + ... + 263475.

It is an arithmetic number, because the mean of its divisors is an integer number (6320904).

Almost surely, 2^55307805 is an apocalyptic number.

It is an amenable number.

55307805 is a deficient number, since it is larger than the sum of its proper divisors (45826659).

55307805 is a wasteful number, since it uses less digits than its factorization.

55307805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526756.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 55307805 is about 7436.9217422264. The cubic root of 55307805 is about 381.0033617548.

The spelling of 55307805 in words is "fifty-five million, three hundred seven thousand, eight hundred five".