54542009 has 4 divisors (see below), whose sum is σ = 54786816. Its totient is φ = 54297204.

The previous prime is 54542003. The next prime is 54542021. The reversal of 54542009 is 90024545.

It is a happy number.

54542009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54542009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54542003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122069 + ... + 122514.

It is an arithmetic number, because the mean of its divisors is an integer number (13696704).

Almost surely, 2^54542009 is an apocalyptic number.

It is an amenable number.

54542009 is a deficient number, since it is larger than the sum of its proper divisors (244807).

54542009 is a wasteful number, since it uses less digits than its factorization.

54542009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244806.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 54542009 is about 7385.2561905461. The cubic root of 54542009 is about 379.2367157837.

The spelling of 54542009 in words is "fifty-four million, five hundred forty-two thousand, nine".