55295809 has 4 divisors (see below), whose sum is σ = 55803220. Its totient is φ = 54788400.

The previous prime is 55295777. The next prime is 55295819. The reversal of 55295809 is 90859255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90859255 = 5 ⋅18171851.

It can be written as a sum of positive squares in 2 ways, for example, as 22118209 + 33177600 = 4703^2 + 5760^2 .

It is a cyclic number.

It is not a de Polignac number, because 55295809 - 2⁵ = 55295777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55295819) 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, 253542 + ... + 253759.

It is an arithmetic number, because the mean of its divisors is an integer number (13950805).

Almost surely, 2^55295809 is an apocalyptic number.

It is an amenable number.

55295809 is a deficient number, since it is larger than the sum of its proper divisors (507411).

55295809 is a wasteful number, since it uses less digits than its factorization.

55295809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507410.

The product of its (nonzero) digits is 162000, while the sum is 43.

The square root of 55295809 is about 7436.1151820020. The cubic root of 55295809 is about 380.9758138237.

Adding to 55295809 its product of nonzero digits (162000), we get a square (55457809 = 7447²).

The spelling of 55295809 in words is "fifty-five million, two hundred ninety-five thousand, eight hundred nine".