54442509 has 8 divisors (see below), whose sum is σ = 79189152. Its totient is φ = 32995440.

The previous prime is 54442499. The next prime is 54442513. The reversal of 54442509 is 90524445.

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

It is not a de Polignac number, because 54442509 - 2⁵ = 54442477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1649773 = 54442509 / (5 + 4 + 4 + 4 + 2 + 5 + 0 + 9).

It is a self number, because there is not a number n which added to its sum of digits gives 54442509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54442519) 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, 824854 + ... + 824919.

It is an arithmetic number, because the mean of its divisors is an integer number (9898644).

Almost surely, 2^54442509 is an apocalyptic number.

It is an amenable number.

54442509 is a deficient number, since it is larger than the sum of its proper divisors (24746643).

54442509 is a wasteful number, since it uses less digits than its factorization.

54442509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649787.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 54442509 is about 7378.5167208593. The cubic root of 54442509 is about 379.0059638487.

The spelling of 54442509 in words is "fifty-four million, four hundred forty-two thousand, five hundred nine".