51354871 has 4 divisors (see below), whose sum is σ = 51371512. Its totient is φ = 51338232.

The previous prime is 51354847. The next prime is 51354889. The reversal of 51354871 is 17845315.

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: 17845315 = 5 ⋅3569063.

It is a cyclic number.

It is not a de Polignac number, because 51354871 - 2¹³ = 51346679 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 (51354811) 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, 2181 + ... + 10366.

It is an arithmetic number, because the mean of its divisors is an integer number (12842878).

Almost surely, 2^51354871 is an apocalyptic number.

51354871 is a deficient number, since it is larger than the sum of its proper divisors (16641).

51354871 is a wasteful number, since it uses less digits than its factorization.

51354871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16640.

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

The square root of 51354871 is about 7166.2312968533. The cubic root of 51354871 is about 371.7011295661.

It can be divided in two parts, 51354 and 871, that added together give a palindrome (52225).

The spelling of 51354871 in words is "fifty-one million, three hundred fifty-four thousand, eight hundred seventy-one".