51494871 has 8 divisors (see below), whose sum is σ = 68848384. Its totient is φ = 34235640.

The previous prime is 51494867. The next prime is 51494873. The reversal of 51494871 is 17849415.

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

It is not a de Polignac number, because 51494871 - 2² = 51494867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51494873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22285 + ... + 24486.

It is an arithmetic number, because the mean of its divisors is an integer number (8606048).

Almost surely, 2^51494871 is an apocalyptic number.

51494871 is a deficient number, since it is larger than the sum of its proper divisors (17353513).

51494871 is a wasteful number, since it uses less digits than its factorization.

51494871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47141.

The product of its digits is 40320, while the sum is 39.

The square root of 51494871 is about 7175.9926839428. The cubic root of 51494871 is about 372.0385914987.

The spelling of 51494871 in words is "fifty-one million, four hundred ninety-four thousand, eight hundred seventy-one".