54771921 has 6 divisors (see below), whose sum is σ = 79115010. Its totient is φ = 36514608.

The previous prime is 54771919. The next prime is 54771929. The reversal of 54771921 is 12917745.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45037521 + 9734400 = 6711^2 + 3120^2 .

It is not a de Polignac number, because 54771921 - 2¹ = 54771919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54771929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3042876 + ... + 3042893.

It is an arithmetic number, because the mean of its divisors is an integer number (13185835).

Almost surely, 2^54771921 is an apocalyptic number.

It is an amenable number.

54771921 is a deficient number, since it is larger than the sum of its proper divisors (24343089).

54771921 is a wasteful number, since it uses less digits than its factorization.

54771921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6085775 (or 6085772 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 54771921 is about 7400.8054291408. The cubic root of 54771921 is about 379.7688367840.

The spelling of 54771921 in words is "fifty-four million, seven hundred seventy-one thousand, nine hundred twenty-one".