55105879 has 4 divisors (see below), whose sum is σ = 56883520. Its totient is φ = 53328240.

The previous prime is 55105847. The next prime is 55105937. The reversal of 55105879 is 97850155.

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

It is a cyclic number.

It is not a de Polignac number, because 55105879 - 2⁵ = 55105847 is a prime.

It is a super-3 number, since 3×55105879³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105679) 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, 888774 + ... + 888835.

It is an arithmetic number, because the mean of its divisors is an integer number (14220880).

Almost surely, 2^55105879 is an apocalyptic number.

55105879 is a deficient number, since it is larger than the sum of its proper divisors (1777641).

55105879 is a wasteful number, since it uses less digits than its factorization.

55105879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777640.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 55105879 is about 7423.3334156563. Note that the first 3 decimals coincide. The cubic root of 55105879 is about 380.5391216525.

The spelling of 55105879 in words is "fifty-five million, one hundred five thousand, eight hundred seventy-nine".