54538721 has 8 divisors (see below), whose sum is σ = 58219200. Its totient is φ = 50939280.

The previous prime is 54538711. The next prime is 54538723. The reversal of 54538721 is 12783545.

It is a happy number.

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 54538721 - 2⁶ = 54538657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54538723) 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, 18866 + ... + 21563.

It is an arithmetic number, because the mean of its divisors is an integer number (7277400).

Almost surely, 2^54538721 is an apocalyptic number.

It is an amenable number.

54538721 is a deficient number, since it is larger than the sum of its proper divisors (3680479).

54538721 is a wasteful number, since it uses less digits than its factorization.

54538721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40519.

The product of its digits is 33600, while the sum is 35.

The square root of 54538721 is about 7385.0335815079. The cubic root of 54538721 is about 379.2290950195.

The spelling of 54538721 in words is "fifty-four million, five hundred thirty-eight thousand, seven hundred twenty-one".