51030009 has 12 divisors (see below), whose sum is σ = 74363796. Its totient is φ = 33718272.

The previous prime is 51029987. The next prime is 51030013. The reversal of 51030009 is 90003015.

It can be written as a sum of positive squares in 2 ways, for example, as 28676025 + 22353984 = 5355^2 + 4728^2 .

It is not a de Polignac number, because 51030009 - 2¹² = 51025913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51029973 and 51030000.

It is not an unprimeable number, because it can be changed into a prime (51030059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24072 + ... + 26105.

It is an arithmetic number, because the mean of its divisors is an integer number (6196983).

Almost surely, 2^51030009 is an apocalyptic number.

It is an amenable number.

51030009 is a deficient number, since it is larger than the sum of its proper divisors (23333787).

51030009 is a wasteful number, since it uses less digits than its factorization.

51030009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50296 (or 50293 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 51030009 is about 7143.5291698152. The cubic root of 51030009 is about 370.9156987885.

The spelling of 51030009 in words is "fifty-one million, thirty thousand, nine".