51132009 has 16 divisors (see below), whose sum is σ = 69175040. Its totient is φ = 33592320.

The previous prime is 51132007. The next prime is 51132019. The reversal of 51132009 is 90023115.

It is not a de Polignac number, because 51132009 - 2¹ = 51132007 is a prime.

It is a super-2 number, since 2×51132009² = 5228964688752162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51132001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88329 + ... + 88905.

It is an arithmetic number, because the mean of its divisors is an integer number (4323440).

Almost surely, 2^51132009 is an apocalyptic number.

It is an amenable number.

51132009 is a deficient number, since it is larger than the sum of its proper divisors (18043031).

51132009 is a wasteful number, since it uses less digits than its factorization.

51132009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 51132009 is about 7150.6649341163. The cubic root of 51132009 is about 371.1626660308.

The spelling of 51132009 in words is "fifty-one million, one hundred thirty-two thousand, nine".