55243807 has 4 divisors (see below), whose sum is σ = 55298320. Its totient is φ = 55189296.

The previous prime is 55243801. The next prime is 55243841. The reversal of 55243807 is 70834255.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70834255 = 5 ⋅14166851.

It is a cyclic number.

It is not a de Polignac number, because 55243807 - 2¹⁹ = 54719519 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 (55243801) 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, 25707 + ... + 27772.

It is an arithmetic number, because the mean of its divisors is an integer number (13824580).

Almost surely, 2^55243807 is an apocalyptic number.

55243807 is a deficient number, since it is larger than the sum of its proper divisors (54513).

55243807 is a wasteful number, since it uses less digits than its factorization.

55243807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54512.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 55243807 is about 7432.6177757234. The cubic root of 55243807 is about 380.8563489653.

The spelling of 55243807 in words is "fifty-five million, two hundred forty-three thousand, eight hundred seven".