51009873 has 8 divisors (see below), whose sum is σ = 68076768. Its totient is φ = 33974784.

The previous prime is 51009859. The next prime is 51009887. The reversal of 51009873 is 37890015.

It is an interprime number because it is at equal distance from previous prime (51009859) and next prime (51009887).

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

It is not a de Polignac number, because 51009873 - 2⁴ = 51009857 is a prime.

It is a super-2 number, since 2×51009873² = 5204014286952258, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51009853) 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, 3915 + ... + 10832.

It is an arithmetic number, because the mean of its divisors is an integer number (8509596).

Almost surely, 2^51009873 is an apocalyptic number.

It is an amenable number.

51009873 is a deficient number, since it is larger than the sum of its proper divisors (17066895).

51009873 is a wasteful number, since it uses less digits than its factorization.

51009873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15903.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 51009873 is about 7142.1196433552. The cubic root of 51009873 is about 370.8669056617.

Adding to 51009873 its reverse (37890015), we get a palindrome (88899888).

The spelling of 51009873 in words is "fifty-one million, nine thousand, eight hundred seventy-three".