55540305 has 24 divisors (see below), whose sum is σ = 98512128. Its totient is φ = 28931616.

The previous prime is 55540301. The next prime is 55540319. The reversal of 55540305 is 50304555.

It is not a de Polignac number, because 55540305 - 2² = 55540301 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55540301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12417 + ... + 16286.

It is an arithmetic number, because the mean of its divisors is an integer number (4104672).

Almost surely, 2^55540305 is an apocalyptic number.

It is an amenable number.

55540305 is a deficient number, since it is larger than the sum of its proper divisors (42971823).

55540305 is a wasteful number, since it uses less digits than its factorization.

55540305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28757 (or 28754 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 55540305 is about 7452.5368164136. The cubic root of 55540305 is about 381.5364959328.

The spelling of 55540305 in words is "fifty-five million, five hundred forty thousand, three hundred five".