55405533 has 16 divisors (see below), whose sum is σ = 78826176. Its totient is φ = 34494720.

The previous prime is 55405517. The next prime is 55405541. The reversal of 55405533 is 33550455.

It is not a de Polignac number, because 55405533 - 2⁴ = 55405517 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55405533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55405633) 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 15 ways as a sum of consecutive naturals, for example, 2535 + ... + 10827.

It is an arithmetic number, because the mean of its divisors is an integer number (4926636).

Almost surely, 2^55405533 is an apocalyptic number.

It is an amenable number.

55405533 is a deficient number, since it is larger than the sum of its proper divisors (23420643).

55405533 is a wasteful number, since it uses less digits than its factorization.

55405533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8444.

The product of its (nonzero) digits is 22500, while the sum is 30.

The square root of 55405533 is about 7443.4893027397. The cubic root of 55405533 is about 381.2276386419.

Adding to 55405533 its reverse (33550455), we get a palindrome (88955988).

The spelling of 55405533 in words is "fifty-five million, four hundred five thousand, five hundred thirty-three".