55199993 has 2 divisors, whose sum is σ = 55199994. Its totient is φ = 55199992.

The previous prime is 55199983. The next prime is 55200007. The reversal of 55199993 is 39999155.

55199993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35557369 + 19642624 = 5963^2 + 4432^2 .

It is a cyclic number.

It is not a de Polignac number, because 55199993 - 2²⁰ = 54151417 is a prime.

It is not a weakly prime, because it can be changed into another prime (55199923) 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 as a sum of consecutive naturals, namely, 27599996 + 27599997.

It is an arithmetic number, because the mean of its divisors is an integer number (27599997).

Almost surely, 2^55199993 is an apocalyptic number.

It is an amenable number.

55199993 is a deficient number, since it is larger than the sum of its proper divisors (1).

55199993 is an equidigital number, since it uses as much as digits as its factorization.

55199993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 492075, while the sum is 50.

The square root of 55199993 is about 7429.6697773185. The cubic root of 55199993 is about 380.7556362979.

The spelling of 55199993 in words is "fifty-five million, one hundred ninety-nine thousand, nine hundred ninety-three".