54809821 has 8 divisors (see below), whose sum is σ = 61183584. Its totient is φ = 48667920.

The previous prime is 54809789. The next prime is 54809827. The reversal of 54809821 is 12890845.

54809821 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 a cyclic number.

It is not a de Polignac number, because 54809821 - 2⁵ = 54809789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54809827) 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 7 ways as a sum of consecutive naturals, for example, 57466 + ... + 58411.

It is an arithmetic number, because the mean of its divisors is an integer number (7647948).

Almost surely, 2^54809821 is an apocalyptic number.

It is an amenable number.

54809821 is a deficient number, since it is larger than the sum of its proper divisors (6373763).

54809821 is a wasteful number, since it uses less digits than its factorization.

54809821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115931.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 54809821 is about 7403.3655184652. The cubic root of 54809821 is about 379.8564115855.

The spelling of 54809821 in words is "fifty-four million, eight hundred nine thousand, eight hundred twenty-one".