55813109 has 16 divisors (see below), whose sum is σ = 62329344. Its totient is φ = 49550400.

The previous prime is 55813103. The next prime is 55813117. The reversal of 55813109 is 90131855.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55813109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55813103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149447 + ... + 149819.

It is an arithmetic number, because the mean of its divisors is an integer number (3895584).

Almost surely, 2^55813109 is an apocalyptic number.

It is an amenable number.

55813109 is a deficient number, since it is larger than the sum of its proper divisors (6516235).

55813109 is a wasteful number, since it uses less digits than its factorization.

55813109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 55813109 is about 7470.8171574467. The cubic root of 55813109 is about 382.1601555176.

The spelling of 55813109 in words is "fifty-five million, eight hundred thirteen thousand, one hundred nine".