51549009 has 8 divisors (see below), whose sum is σ = 68846592. Its totient is φ = 34308720.

The previous prime is 51549007. The next prime is 51549041. The reversal of 51549009 is 90094515.

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

It is not a de Polignac number, because 51549009 - 2¹ = 51549007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51549007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12177 + ... + 15854.

It is an arithmetic number, because the mean of its divisors is an integer number (8605824).

Almost surely, 2^51549009 is an apocalyptic number.

It is an amenable number.

51549009 is a deficient number, since it is larger than the sum of its proper divisors (17297583).

51549009 is a wasteful number, since it uses less digits than its factorization.

51549009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28647.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 51549009 is about 7179.7638540554. The cubic root of 51549009 is about 372.1689240320.

The spelling of 51549009 in words is "fifty-one million, five hundred forty-nine thousand, nine".