55819599 has 24 divisors (see below), whose sum is σ = 82225920. Its totient is φ = 33657360.

The previous prime is 55819571. The next prime is 55819607. The reversal of 55819599 is 99591855.

It is a happy number.

It is not a de Polignac number, because 55819599 - 2⁵ = 55819567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55819529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133012 + ... + 133430.

It is an arithmetic number, because the mean of its divisors is an integer number (3426080).

Almost surely, 2^55819599 is an apocalyptic number.

55819599 is a deficient number, since it is larger than the sum of its proper divisors (26406321).

55819599 is a wasteful number, since it uses less digits than its factorization.

55819599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 800 counting only the distinct ones).

The product of its digits is 729000, while the sum is 51.

The square root of 55819599 is about 7471.2515015893. The cubic root of 55819599 is about 382.1749675890.

The spelling of 55819599 in words is "fifty-five million, eight hundred nineteen thousand, five hundred ninety-nine".