55689559 has 4 divisors (see below), whose sum is σ = 55729960. Its totient is φ = 55649160.

The previous prime is 55689539. The next prime is 55689577. The reversal of 55689559 is 95598655.

It is a happy number.

55689559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55689559 - 2⁵ = 55689527 is a prime.

It is a super-2 number, since 2×55689559² = 6202653963228962, which contains 22 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 (55689539) 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 3 ways as a sum of consecutive naturals, for example, 18057 + ... + 20914.

It is an arithmetic number, because the mean of its divisors is an integer number (13932490).

Almost surely, 2^55689559 is an apocalyptic number.

55689559 is a deficient number, since it is larger than the sum of its proper divisors (40401).

55689559 is a wasteful number, since it uses less digits than its factorization.

55689559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40400.

The product of its digits is 2430000, while the sum is 52.

The square root of 55689559 is about 7462.5437352152. The cubic root of 55689559 is about 381.8779591507.

The spelling of 55689559 in words is "fifty-five million, six hundred eighty-nine thousand, five hundred fifty-nine".