54543209 has 8 divisors (see below), whose sum is σ = 62389248. Its totient is φ = 46710720.

The previous prime is 54543169. The next prime is 54543227. The reversal of 54543209 is 90234545.

It is a happy number.

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

It is not a de Polignac number, because 54543209 - 2¹² = 54539113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54543299) 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, 7649 + ... + 12945.

It is an arithmetic number, because the mean of its divisors is an integer number (7798656).

Almost surely, 2^54543209 is an apocalyptic number.

It is an amenable number.

54543209 is a deficient number, since it is larger than the sum of its proper divisors (7846039).

54543209 is a wasteful number, since it uses less digits than its factorization.

54543209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 54543209 is about 7385.3374330494. The cubic root of 54543209 is about 379.2394970083.

The spelling of 54543209 in words is "fifty-four million, five hundred forty-three thousand, two hundred nine".