55543589 has 4 divisors (see below), whose sum is σ = 55558560. Its totient is φ = 55528620.

The previous prime is 55543571. The next prime is 55543591. The reversal of 55543589 is 98534555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55543589 - 2⁸ = 55543333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55543529) 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, 2702 + ... + 10880.

It is an arithmetic number, because the mean of its divisors is an integer number (13889640).

Almost surely, 2^55543589 is an apocalyptic number.

It is an amenable number.

55543589 is a deficient number, since it is larger than the sum of its proper divisors (14971).

55543589 is an equidigital number, since it uses as much as digits as its factorization.

55543589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14970.

The product of its digits is 540000, while the sum is 44.

The square root of 55543589 is about 7452.7571408171. The cubic root of 55543589 is about 381.5440156440.

It can be divided in two parts, 555 and 43589, that added together give a palindrome (44144).

The spelling of 55543589 in words is "fifty-five million, five hundred forty-three thousand, five hundred eighty-nine".