54177921 has 24 divisors (see below), whose sum is σ = 89631360. Its totient is φ = 30891456.

The previous prime is 54177919. The next prime is 54177923. The reversal of 54177921 is 12977145.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (54177919) and next prime (54177923).

It is not a de Polignac number, because 54177921 - 2¹ = 54177919 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54177923) 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 23 ways as a sum of consecutive naturals, for example, 50436 + ... + 51498.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^54177921 is an apocalyptic number.

It is an amenable number.

54177921 is a deficient number, since it is larger than the sum of its proper divisors (35453439).

54177921 is a wasteful number, since it uses less digits than its factorization.

54177921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885 (or 1882 counting only the distinct ones).

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

The square root of 54177921 is about 7360.5652636194. The cubic root of 54177921 is about 378.3909828681.

The spelling of 54177921 in words is "fifty-four million, one hundred seventy-seven thousand, nine hundred twenty-one".