54813921 has 16 divisors (see below), whose sum is σ = 75644928. Its totient is φ = 35269200.

The previous prime is 54813919. The next prime is 54813923. The reversal of 54813921 is 12931845.

It is an interprime number because it is at equal distance from previous prime (54813919) and next prime (54813923).

It is not a de Polignac number, because 54813921 - 2¹ = 54813919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54813923) 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 15 ways as a sum of consecutive naturals, for example, 55966 + ... + 56936.

It is an arithmetic number, because the mean of its divisors is an integer number (4727808).

Almost surely, 2^54813921 is an apocalyptic number.

It is an amenable number.

54813921 is a deficient number, since it is larger than the sum of its proper divisors (20831007).

54813921 is a wasteful number, since it uses less digits than its factorization.

54813921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612.

The product of its digits is 8640, while the sum is 33.

The square root of 54813921 is about 7403.6424143796. The cubic root of 54813921 is about 379.8658829566.

The spelling of 54813921 in words is "fifty-four million, eight hundred thirteen thousand, nine hundred twenty-one".