55509159 has 4 divisors (see below), whose sum is σ = 74012216. Its totient is φ = 37006104.

The previous prime is 55509151. The next prime is 55509163. The reversal of 55509159 is 95190555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55509159 - 2³ = 55509151 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 (55509151) 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, 9251524 + ... + 9251529.

It is an arithmetic number, because the mean of its divisors is an integer number (18503054).

Almost surely, 2^55509159 is an apocalyptic number.

55509159 is a deficient number, since it is larger than the sum of its proper divisors (18503057).

55509159 is a wasteful number, since it uses less digits than its factorization.

55509159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18503056.

The product of its (nonzero) digits is 50625, while the sum is 39.

The square root of 55509159 is about 7450.4468993477. The cubic root of 55509159 is about 381.4651630049.

The spelling of 55509159 in words is "fifty-five million, five hundred nine thousand, one hundred fifty-nine".