55519109 has 4 divisors (see below), whose sum is σ = 57310080. Its totient is φ = 53728140.

The previous prime is 55519103. The next prime is 55519111. The reversal of 55519109 is 90191555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55519109 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 (55519103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895439 + ... + 895500.

It is an arithmetic number, because the mean of its divisors is an integer number (14327520).

Almost surely, 2^55519109 is an apocalyptic number.

It is an amenable number.

55519109 is a deficient number, since it is larger than the sum of its proper divisors (1790971).

55519109 is a wasteful number, since it uses less digits than its factorization.

55519109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790970.

The product of its (nonzero) digits is 10125, while the sum is 35.

The square root of 55519109 is about 7451.1146146063. The cubic root of 55519109 is about 381.4879541483.

The spelling of 55519109 in words is "fifty-five million, five hundred nineteen thousand, one hundred nine".