55508305 has 4 divisors (see below), whose sum is σ = 66609972. Its totient is φ = 44406640.

The previous prime is 55508293. The next prime is 55508309. The reversal of 55508305 is 50380555.

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 6270016 + 49238289 = 2504^2 + 7017^2 .

It is not a de Polignac number, because 55508305 - 2⁵ = 55508273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55508309) 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, 5550826 + ... + 5550835.

It is an arithmetic number, because the mean of its divisors is an integer number (16652493).

Almost surely, 2^55508305 is an apocalyptic number.

It is an amenable number.

55508305 is a deficient number, since it is larger than the sum of its proper divisors (11101667).

55508305 is a wasteful number, since it uses less digits than its factorization.

55508305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101666.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 55508305 is about 7450.3895871290. The cubic root of 55508305 is about 381.4632067336.

The spelling of 55508305 in words is "fifty-five million, five hundred eight thousand, three hundred five".