55109599 has 16 divisors (see below), whose sum is σ = 59904000. Its totient is φ = 50571360.

The previous prime is 55109591. The next prime is 55109623. The reversal of 55109599 is 99590155.

It is a happy number.

It is not a de Polignac number, because 55109599 - 2³ = 55109591 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 (55109591) 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 15 ways as a sum of consecutive naturals, for example, 52522 + ... + 53560.

It is an arithmetic number, because the mean of its divisors is an integer number (3744000).

Almost surely, 2^55109599 is an apocalyptic number.

55109599 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

55109599 is a deficient number, since it is larger than the sum of its proper divisors (4794401).

55109599 is a wasteful number, since it uses less digits than its factorization.

55109599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158.

The product of its (nonzero) digits is 91125, while the sum is 43.

The square root of 55109599 is about 7423.5839727183. The cubic root of 55109599 is about 380.5476844030.

The spelling of 55109599 in words is "fifty-five million, one hundred nine thousand, five hundred ninety-nine".