51143585 has 4 divisors (see below), whose sum is σ = 61372308. Its totient is φ = 40914864.

The previous prime is 51143557. The next prime is 51143593. The reversal of 51143585 is 58534115.

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 8162449 + 42981136 = 2857^2 + 6556^2 .

It is a cyclic number.

It is not a de Polignac number, because 51143585 - 2¹⁴ = 51127201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5114354 + ... + 5114363.

It is an arithmetic number, because the mean of its divisors is an integer number (15343077).

Almost surely, 2^51143585 is an apocalyptic number.

It is an amenable number.

51143585 is a deficient number, since it is larger than the sum of its proper divisors (10228723).

51143585 is a wasteful number, since it uses less digits than its factorization.

51143585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10228722.

The product of its digits is 12000, while the sum is 32.

The square root of 51143585 is about 7151.4743235224. The cubic root of 51143585 is about 371.1906736325.

The spelling of 51143585 in words is "fifty-one million, one hundred forty-three thousand, five hundred eighty-five".