51887571 has 4 divisors (see below), whose sum is σ = 69183432. Its totient is φ = 34591712.

The previous prime is 51887569. The next prime is 51887573. The reversal of 51887571 is 17578815.

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

It is an interprime number because it is at equal distance from previous prime (51887569) and next prime (51887573).

It is a cyclic number.

It is not a de Polignac number, because 51887571 - 2¹ = 51887569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51887573) 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 3 ways as a sum of consecutive naturals, for example, 8647926 + ... + 8647931.

It is an arithmetic number, because the mean of its divisors is an integer number (17295858).

Almost surely, 2^51887571 is an apocalyptic number.

51887571 is a deficient number, since it is larger than the sum of its proper divisors (17295861).

51887571 is a wasteful number, since it uses less digits than its factorization.

51887571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17295860.

The product of its digits is 78400, while the sum is 42.

The square root of 51887571 is about 7203.3027841401. The cubic root of 51887571 is about 372.9819199789.

The spelling of 51887571 in words is "fifty-one million, eight hundred eighty-seven thousand, five hundred seventy-one".