51481173 has 8 divisors (see below), whose sum is σ = 70855936. Its totient is φ = 33213600.

The previous prime is 51481163. The next prime is 51481181. The reversal of 51481173 is 37118415.

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

It is not a de Polignac number, because 51481173 - 2⁵ = 51481141 is a prime.

It is a super-2 number, since 2×51481173² = 5300622346911858, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 51481173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51481163) 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, 276688 + ... + 276873.

It is an arithmetic number, because the mean of its divisors is an integer number (8856992).

Almost surely, 2^51481173 is an apocalyptic number.

It is an amenable number.

51481173 is a deficient number, since it is larger than the sum of its proper divisors (19374763).

51481173 is a wasteful number, since it uses less digits than its factorization.

51481173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553595.

The product of its digits is 3360, while the sum is 30.

The square root of 51481173 is about 7175.0381880517. The cubic root of 51481173 is about 372.0056002741.

Adding to 51481173 its reverse (37118415), we get a palindrome (88599588).

The spelling of 51481173 in words is "fifty-one million, four hundred eighty-one thousand, one hundred seventy-three".