55365409 has 4 divisors (see below), whose sum is σ = 60398640. Its totient is φ = 50332180.

The previous prime is 55365397. The next prime is 55365421. The reversal of 55365409 is 90456355.

55365409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (55365397) and next prime (55365421).

It is a cyclic number.

It is not a de Polignac number, because 55365409 - 2¹¹ = 55363361 is a prime.

It is a super-3 number, since 3×55365409³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55365469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2516599 + ... + 2516620.

It is an arithmetic number, because the mean of its divisors is an integer number (15099660).

Almost surely, 2^55365409 is an apocalyptic number.

It is an amenable number.

55365409 is a deficient number, since it is larger than the sum of its proper divisors (5033231).

55365409 is a wasteful number, since it uses less digits than its factorization.

55365409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033230.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 55365409 is about 7440.7935732689. The cubic root of 55365409 is about 381.1355896418.

The spelling of 55365409 in words is "fifty-five million, three hundred sixty-five thousand, four hundred nine".