55384033 has 4 divisors (see below), whose sum is σ = 55401220. Its totient is φ = 55366848.

The previous prime is 55384019. The next prime is 55384039. The reversal of 55384033 is 33048355.

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 33039504 + 22344529 = 5748^2 + 4727^2 .

It is a 3-Lehmer number, since φ(55384033) divides (55384033-1)³.

It is a cyclic number.

It is not a de Polignac number, because 55384033 - 2¹³ = 55375841 is a prime.

It is a super-2 number, since 2×55384033² = 6134782222690178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55383986 and 55384004.

It is not an unprimeable number, because it can be changed into a prime (55384039) 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, 2148 + ... + 10741.

It is an arithmetic number, because the mean of its divisors is an integer number (13850305).

Almost surely, 2^55384033 is an apocalyptic number.

55384033 is the 4297-th octagonal number.

It is an amenable number.

55384033 is a deficient number, since it is larger than the sum of its proper divisors (17187).

55384033 is a wasteful number, since it uses less digits than its factorization.

55384033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17186.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 55384033 is about 7442.0449474590. The cubic root of 55384033 is about 381.1783207356.

The spelling of 55384033 in words is "fifty-five million, three hundred eighty-four thousand, thirty-three".