55543889 has 8 divisors (see below), whose sum is σ = 57120000. Its totient is φ = 53978400.

The previous prime is 55543877. The next prime is 55543937. The reversal of 55543889 is 98834555.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55543889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55546889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8612 + ... + 13610.

It is an arithmetic number, because the mean of its divisors is an integer number (7140000).

Almost surely, 2^55543889 is an apocalyptic number.

It is an amenable number.

55543889 is a deficient number, since it is larger than the sum of its proper divisors (1576111).

55543889 is a wasteful number, since it uses less digits than its factorization.

55543889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311.

The product of its digits is 864000, while the sum is 47.

The square root of 55543889 is about 7452.7772675695. Note that the first 3 decimals coincide. The cubic root of 55543889 is about 381.5447025699.

It can be divided in two parts, 555 and 43889, that added together give a palindrome (44444).

The spelling of 55543889 in words is "fifty-five million, five hundred forty-three thousand, eight hundred eighty-nine".