55133133 has 16 divisors (see below), whose sum is σ = 81326592. Its totient is φ = 32942000.

The previous prime is 55133131. The next prime is 55133137. The reversal of 55133133 is 33133155.

55133133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55133133 - 2¹ = 55133131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55133131) 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 15 ways as a sum of consecutive naturals, for example, 9423 + ... + 14108.

It is an arithmetic number, because the mean of its divisors is an integer number (5082912).

Almost surely, 2^55133133 is an apocalyptic number.

It is an amenable number.

55133133 is a deficient number, since it is larger than the sum of its proper divisors (26193459).

55133133 is a wasteful number, since it uses less digits than its factorization.

55133133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23616.

The product of its digits is 2025, while the sum is 24.

The square root of 55133133 is about 7425.1688869682. The cubic root of 55133133 is about 380.6018463810.

Adding to 55133133 its reverse (33133155), we get a palindrome (88266288).

It can be divided in two parts, 5513 and 3133, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 55133133 in words is "fifty-five million, one hundred thirty-three thousand, one hundred thirty-three".