51575143 has 4 divisors (see below), whose sum is σ = 51679000. Its totient is φ = 51471288.

The previous prime is 51575141. The next prime is 51575149. The reversal of 51575143 is 34157515.

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

It is a cyclic number.

It is not a de Polignac number, because 51575143 - 2¹ = 51575141 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 (51575141) 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, 51180 + ... + 52177.

It is an arithmetic number, because the mean of its divisors is an integer number (12919750).

Almost surely, 2^51575143 is an apocalyptic number.

51575143 is a deficient number, since it is larger than the sum of its proper divisors (103857).

51575143 is a wasteful number, since it uses less digits than its factorization.

51575143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103856.

The product of its digits is 10500, while the sum is 31.

The square root of 51575143 is about 7181.5835997362. The cubic root of 51575143 is about 372.2318067118.

The spelling of 51575143 in words is "fifty-one million, five hundred seventy-five thousand, one hundred forty-three".