55800899 has 32 divisors (see below), whose sum is σ = 72855552. Its totient is φ = 41472000.

The previous prime is 55800887. The next prime is 55800911. The reversal of 55800899 is 99800855.

55800899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 7470²-1.

It is an interprime number because it is at equal distance from previous prime (55800887) and next prime (55800911).

It is a cyclic number.

It is not a de Polignac number, because 55800899 - 2²⁰ = 54752323 is a prime.

It is a super-2 number, since 2×55800899² = 6227480658416402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55800839) 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 31 ways as a sum of consecutive naturals, for example, 231419 + ... + 231659.

It is an arithmetic number, because the mean of its divisors is an integer number (2276736).

Almost surely, 2^55800899 is an apocalyptic number.

55800899 is a deficient number, since it is larger than the sum of its proper divisors (17054653).

55800899 is a wasteful number, since it uses less digits than its factorization.

55800899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387.

The product of its (nonzero) digits is 129600, while the sum is 44.

The square root of 55800899 is about 7469.9999330656. Note that the first 4 decimals coincide. The cubic root of 55800899 is about 382.1322856265.

Subtracting from 55800899 its sum of digits (44), we obtain a palindrome (55800855).

The spelling of 55800899 in words is "fifty-five million, eight hundred thousand, eight hundred ninety-nine".