55311133 has 4 divisors (see below), whose sum is σ = 55449468. Its totient is φ = 55172800.

The previous prime is 55311121. The next prime is 55311163. The reversal of 55311133 is 33111355.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51222649 + 4088484 = 7157^2 + 2022^2 .

It is a cyclic number.

It is not a de Polignac number, because 55311133 - 2⁵ = 55311101 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 (55311163) 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 3 ways as a sum of consecutive naturals, for example, 68566 + ... + 69367.

It is an arithmetic number, because the mean of its divisors is an integer number (13862367).

Almost surely, 2^55311133 is an apocalyptic number.

It is an amenable number.

55311133 is a deficient number, since it is larger than the sum of its proper divisors (138335).

55311133 is a wasteful number, since it uses less digits than its factorization.

55311133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138334.

The product of its digits is 675, while the sum is 22.

The square root of 55311133 is about 7437.1454873493. The cubic root of 55311133 is about 381.0110035561.

Adding to 55311133 its reverse (33111355), we get a palindrome (88422488).

The spelling of 55311133 in words is "fifty-five million, three hundred eleven thousand, one hundred thirty-three".