55518279 has 8 divisors (see below), whose sum is σ = 74292720. Its totient is φ = 36878016.

The previous prime is 55518269. The next prime is 55518283. The reversal of 55518279 is 97281555.

55518279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55518279 - 2⁴ = 55518263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55518279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55518259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32574 + ... + 34235.

It is an arithmetic number, because the mean of its divisors is an integer number (9286590).

Almost surely, 2^55518279 is an apocalyptic number.

55518279 is a deficient number, since it is larger than the sum of its proper divisors (18774441).

55518279 is a wasteful number, since it uses less digits than its factorization.

55518279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67089.

The product of its digits is 126000, while the sum is 42.

The square root of 55518279 is about 7451.0589180331. The cubic root of 55518279 is about 381.4860530817.

The spelling of 55518279 in words is "fifty-five million, five hundred eighteen thousand, two hundred seventy-nine".