54518721 has 8 divisors (see below), whose sum is σ = 73155264. Its totient is φ = 36114000.

The previous prime is 54518707. The next prime is 54518741. The reversal of 54518721 is 12781545.

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

It is not a de Polignac number, because 54518721 - 2⁷ = 54518593 is a prime.

It is a super-3 number, since 3×54518721³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54518741) 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, 57405 + ... + 58346.

It is an arithmetic number, because the mean of its divisors is an integer number (9144408).

Almost surely, 2^54518721 is an apocalyptic number.

It is an amenable number.

54518721 is a deficient number, since it is larger than the sum of its proper divisors (18636543).

54518721 is a wasteful number, since it uses less digits than its factorization.

54518721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115911.

The product of its digits is 11200, while the sum is 33.

The square root of 54518721 is about 7383.6793673615. The cubic root of 54518721 is about 379.1827334066.

The spelling of 54518721 in words is "fifty-four million, five hundred eighteen thousand, seven hundred twenty-one".