55881433 has 4 divisors (see below), whose sum is σ = 57391780. Its totient is φ = 54371088.

The previous prime is 55881403. The next prime is 55881457. The reversal of 55881433 is 33418855.

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 29942784 + 25938649 = 5472^2 + 5093^2 .

It is a cyclic number.

It is not a de Polignac number, because 55881433 - 2¹³ = 55873241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1510309 = 55881433 / (5 + 5 + 8 + 8 + 1 + 4 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55881392 and 55881401.

It is not an unprimeable number, because it can be changed into a prime (55881403) 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, 755118 + ... + 755191.

It is an arithmetic number, because the mean of its divisors is an integer number (14347945).

Almost surely, 2^55881433 is an apocalyptic number.

It is an amenable number.

55881433 is a deficient number, since it is larger than the sum of its proper divisors (1510347).

55881433 is a wasteful number, since it uses less digits than its factorization.

55881433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510346.

The product of its digits is 57600, while the sum is 37.

The square root of 55881433 is about 7475.3884848883. The cubic root of 55881433 is about 382.3160332533.

It can be divided in two parts, 5588 and 1433, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 55881433 in words is "fifty-five million, eight hundred eighty-one thousand, four hundred thirty-three".