51885173 has 4 divisors (see below), whose sum is σ = 54937260. Its totient is φ = 48833088.

The previous prime is 51885161. The next prime is 51885179. The reversal of 51885173 is 37158815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38031889 + 13853284 = 6167^2 + 3722^2 .

It is a cyclic number.

It is not a de Polignac number, because 51885173 - 2⁴ = 51885157 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 (51885179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526018 + ... + 1526051.

It is an arithmetic number, because the mean of its divisors is an integer number (13734315).

Almost surely, 2^51885173 is an apocalyptic number.

It is an amenable number.

51885173 is a deficient number, since it is larger than the sum of its proper divisors (3052087).

51885173 is a wasteful number, since it uses less digits than its factorization.

51885173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052086.

The product of its digits is 33600, while the sum is 38.

The square root of 51885173 is about 7203.1363307937. The cubic root of 51885173 is about 372.9761740658.

The spelling of 51885173 in words is "fifty-one million, eight hundred eighty-five thousand, one hundred seventy-three".