55543331 has 4 divisors (see below), whose sum is σ = 56725152. Its totient is φ = 54361512.

The previous prime is 55543297. The next prime is 55543333. The reversal of 55543331 is 13334555.

55543331 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 a de Polignac number, because none of the positive numbers 2^k-55543331 is a prime.

It is a super-2 number, since 2×55543331² = 6170123237151122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 55543294 and 55543303.

It is not an unprimeable number, because it can be changed into a prime (55543333) 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, 590840 + ... + 590933.

It is an arithmetic number, because the mean of its divisors is an integer number (14181288).

Almost surely, 2^55543331 is an apocalyptic number.

55543331 is a deficient number, since it is larger than the sum of its proper divisors (1181821).

55543331 is a wasteful number, since it uses less digits than its factorization.

55543331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181820.

The product of its digits is 13500, while the sum is 29.

The square root of 55543331 is about 7452.7398317666. The cubic root of 55543331 is about 381.5434248857.

Adding to 55543331 its reverse (13334555), we get a palindrome (68877886).

The spelling of 55543331 in words is "fifty-five million, five hundred forty-three thousand, three hundred thirty-one".