55506889 has 8 divisors (see below), whose sum is σ = 58871232. Its totient is φ = 52221840.

The previous prime is 55506883. The next prime is 55506931. The reversal of 55506889 is 98860555.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55506889 - 2³ = 55506881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55506881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18379 + ... + 21184.

It is an arithmetic number, because the mean of its divisors is an integer number (7358904).

Almost surely, 2^55506889 is an apocalyptic number.

It is an amenable number.

55506889 is a deficient number, since it is larger than the sum of its proper divisors (3364343).

55506889 is a wasteful number, since it uses less digits than its factorization.

55506889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39647.

The product of its (nonzero) digits is 432000, while the sum is 46.

The square root of 55506889 is about 7450.2945579353. The cubic root of 55506889 is about 381.4599630359.

It can be divided in two parts, 55 and 506889, that added together give a square (506944 = 712²).

The spelling of 55506889 in words is "fifty-five million, five hundred six thousand, eight hundred eighty-nine".