55491 has 8 divisors (see below), whose sum is σ = 75600. Its totient is φ = 36192.

The previous prime is 55487. The next prime is 55501. The reversal of 55491 is 19455.

55491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55491 - 2² = 55487 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55491.

It is not an unprimeable number, because it can be changed into a prime (55411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16 + ... + 333.

It is an arithmetic number, because the mean of its divisors is an integer number (9450).

2⁵⁵⁴⁹¹ is an apocalyptic number.

55491 is a deficient number, since it is larger than the sum of its proper divisors (20109).

55491 is a wasteful number, since it uses less digits than its factorization.

55491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405.

The product of its digits is 900, while the sum is 24.

The square root of 55491 is about 235.5652775772. The cubic root of 55491 is about 38.1423561574.

The spelling of 55491 in words is "fifty-five thousand, four hundred ninety-one".