54218729 has 8 divisors (see below), whose sum is σ = 57594888. Its totient is φ = 50863360.

The previous prime is 54218707. The next prime is 54218741. The reversal of 54218729 is 92781245.

It can be written as a sum of positive squares in 4 ways, for example, as 4840000 + 49378729 = 2200^2 + 7027^2 .

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 54218729 - 2²⁴ = 37441513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54218692 and 54218701.

It is not an unprimeable number, because it can be changed into a prime (54218029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359 + ... + 10419.

It is an arithmetic number, because the mean of its divisors is an integer number (7199361).

Almost surely, 2^54218729 is an apocalyptic number.

It is an amenable number.

54218729 is a deficient number, since it is larger than the sum of its proper divisors (3376159).

54218729 is a wasteful number, since it uses less digits than its factorization.

54218729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10395.

The product of its digits is 40320, while the sum is 38.

The square root of 54218729 is about 7363.3368115278. The cubic root of 54218729 is about 378.4859631579.

The spelling of 54218729 in words is "fifty-four million, two hundred eighteen thousand, seven hundred twenty-nine".