55185799 has 4 divisors (see below), whose sum is σ = 55200736. Its totient is φ = 55170864.

The previous prime is 55185761. The next prime is 55185803. The reversal of 55185799 is 99758155.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55185799 - 2¹³ = 55177607 is a prime.

It is a super-2 number, since 2×55185799² = 6090944822536802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55185749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2587 + ... + 10819.

It is an arithmetic number, because the mean of its divisors is an integer number (13800184).

Almost surely, 2^55185799 is an apocalyptic number.

55185799 is a deficient number, since it is larger than the sum of its proper divisors (14937).

55185799 is an equidigital number, since it uses as much as digits as its factorization.

55185799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14936.

The product of its digits is 567000, while the sum is 49.

The square root of 55185799 is about 7428.7144917543. The cubic root of 55185799 is about 380.7229979556.

The spelling of 55185799 in words is "fifty-five million, one hundred eighty-five thousand, seven hundred ninety-nine".