54247209 has 8 divisors (see below), whose sum is σ = 74011872. Its totient is φ = 35323680.

The previous prime is 54247199. The next prime is 54247211. The reversal of 54247209 is 90274245.

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

It is not a de Polignac number, because 54247209 - 2⁹ = 54246697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54247209.

It is not an unprimeable number, because it can be changed into a prime (54247279) 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, 210132 + ... + 210389.

It is an arithmetic number, because the mean of its divisors is an integer number (9251484).

Almost surely, 2^54247209 is an apocalyptic number.

It is an amenable number.

54247209 is a deficient number, since it is larger than the sum of its proper divisors (19764663).

54247209 is a wasteful number, since it uses less digits than its factorization.

54247209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420567.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 54247209 is about 7365.2704634657. The cubic root of 54247209 is about 378.5522218942.

The spelling of 54247209 in words is "fifty-four million, two hundred forty-seven thousand, two hundred nine".