55730305 has 4 divisors (see below), whose sum is σ = 66876372. Its totient is φ = 44584240.

The previous prime is 55730299. The next prime is 55730309. The reversal of 55730305 is 50303755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50303755 = 5 ⋅10060751.

It can be written as a sum of positive squares in 2 ways, for example, as 9054081 + 46676224 = 3009^2 + 6832^2 .

It is not a de Polignac number, because 55730305 - 2⁵ = 55730273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55730309) 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, 5573026 + ... + 5573035.

It is an arithmetic number, because the mean of its divisors is an integer number (16719093).

Almost surely, 2^55730305 is an apocalyptic number.

It is an amenable number.

55730305 is a deficient number, since it is larger than the sum of its proper divisors (11146067).

55730305 is a wasteful number, since it uses less digits than its factorization.

55730305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11146066.

The product of its (nonzero) digits is 7875, while the sum is 28.

The square root of 55730305 is about 7465.2732702829. The cubic root of 55730305 is about 381.9710717931.

The spelling of 55730305 in words is "fifty-five million, seven hundred thirty thousand, three hundred five".