55052309 has 4 divisors (see below), whose sum is σ = 59287116. Its totient is φ = 50817504.

The previous prime is 55052281. The next prime is 55052321. The reversal of 55052309 is 90325055.

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 25654225 + 29398084 = 5065^2 + 5422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55052309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55052399) 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, 2117384 + ... + 2117409.

It is an arithmetic number, because the mean of its divisors is an integer number (14821779).

Almost surely, 2^55052309 is an apocalyptic number.

It is an amenable number.

55052309 is a deficient number, since it is larger than the sum of its proper divisors (4234807).

55052309 is a wasteful number, since it uses less digits than its factorization.

55052309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4234806.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 55052309 is about 7419.7243210243. The cubic root of 55052309 is about 380.4157706873.

The spelling of 55052309 in words is "fifty-five million, fifty-two thousand, three hundred nine".