51384571 has 4 divisors (see below), whose sum is σ = 58725232. Its totient is φ = 44043912.

The previous prime is 51384563. The next prime is 51384589. The reversal of 51384571 is 17548315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17548315 = 5 ⋅3509663.

It is a cyclic number.

It is not a de Polignac number, because 51384571 - 2³ = 51384563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51385571) by changing a digit.

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, 3670320 + ... + 3670333.

It is an arithmetic number, because the mean of its divisors is an integer number (14681308).

Almost surely, 2^51384571 is an apocalyptic number.

51384571 is a deficient number, since it is larger than the sum of its proper divisors (7340661).

51384571 is an equidigital number, since it uses as much as digits as its factorization.

51384571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340660.

The product of its digits is 16800, while the sum is 34.

The square root of 51384571 is about 7168.3032162430. The cubic root of 51384571 is about 371.7727709110.

The spelling of 51384571 in words is "fifty-one million, three hundred eighty-four thousand, five hundred seventy-one".