54218005 has 8 divisors (see below), whose sum is σ = 65316312. Its totient is φ = 43204608.

The previous prime is 54217997. The next prime is 54218009. The reversal of 54218005 is 50081245.

It can be written as a sum of positive squares in 4 ways, for example, as 21511044 + 32706961 = 4638^2 + 5719^2 .

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 54218005 - 2³ = 54217997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54218009) 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, 19812 + ... + 22381.

It is an arithmetic number, because the mean of its divisors is an integer number (8164539).

Almost surely, 2^54218005 is an apocalyptic number.

It is an amenable number.

54218005 is a deficient number, since it is larger than the sum of its proper divisors (11098307).

54218005 is a wasteful number, since it uses less digits than its factorization.

54218005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42455.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 54218005 is about 7363.2876488699. The cubic root of 54218005 is about 378.4842784691.

The spelling of 54218005 in words is "fifty-four million, two hundred eighteen thousand, five".